Kits

IMS Bearing Upgrade Kit with 58mm Flange for “Open” Engines (doing an engine rebuild) with Complete Ancillaries – Essential Reliability Upgrade for Porsche 987.1 Boxster / Cayman Tiptronic Models

This 58mm flange IMS bearing upgrade kit is specifically engineered for Porsche 987.1 Boxster / Cayman, Tiptronic cars fitted with M97 intermediate shaft bearings. Supplied as a complete installation package, the kit includes a strengthened bearing assembly, fresh mounting hardware, seals, exhaust clamps, sleeves and all additional ancillaries needed to complete the upgrade in one comprehensive service.

Fits:

• Porsche Boxster 987 2.7L 2005 -08/08
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• Porsche Cayman 2.7L 987C 2006-08
• Porsche Cayman S 3.4L 987C 2005-08

(Not for M96 Engines)

The IMS (Intermediate Shaft) bearing supports the intermediate shaft that drives the camshafts. When the original bearing design deteriorates, it can fail without warning—leading to catastrophic engine damage. Upgrading to a modern, precision-engineered bearing significantly improves durability and long-term reliability, making this kit one of the most important preventative maintenance investments for these Porsche models.

What the IMS Bearing Upgrade Kit Does

This complete kit:

• Replaces the vulnerable original IMS bearing with a fortified, precision-engineered alternative
  
• Reduces friction and improves lubrication stability
• Protects the intermediate shaft from premature wear
• Prevents metal debris contamination inside the engine
• Restores confidence in long-term engine reliability
• Includes all necessary hardware, clamps, sleeves and seals for a seamless installation

Designed to meet the demands of both road use and high-performance driving.

Why IMS Bearings Fail in Porsche M97 Engines

Common causes include:

• Lubrication starvation, leading to ball bearing scoring
  
• Seal degradation, causing grease loss and overheating
  
• Contaminants entering the bearing assembly
• High engine speeds, accelerating wear
  
• Age-related material fatigue
• Inadequate internal lubrication flow in the early intermediate shaft design

Symptoms are often subtle—or non-existent—until severe engine damage has occurred.

Why the IMS Bearing Should Be Upgraded

Upgrading the IMS bearing provides:

• Prevention of catastrophic bearing failure
• Significant extension of engine lifespan
• Peace of mind for owners of 996/997/986/987 models
• A stronger, more stable bearing with improved lubrication path
• Reduction in maintenance costs over time
• A complete installation solution thanks to included ancillaries

This kit is essential for any Porsche owner planning long-term stewardship, spirited driving, or engine rebuild work.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

IMSKIT987TIP.2

The product you are viewing cross references to these numbers

IMS Bearing Upgrade Kit with Full Ancillaries – Essential Protection for Early Porsche 987.1 Boxster, Tiptronic with M96 Engines

This IMS bearing upgrade kit is engineered for early Porsche 987.1 Boxster / Boxster S Tiptronic models equipped with the M96 engine, providing a reliable solution to one of the platform’s most well-known weak points—the original intermediate shaft bearing. The kit includes the upgraded IMS bearing along with all required ancillaries, such as exhaust clamps, sleeves, installation hardware, seals and mounting components, ensuring a complete and efficient upgrade process.

Fits:

• Porsche Boxster 987 2.7L 2005-2006
• Porsche Boxster 987 S 3.2L 2005-2006

The IMS (Intermediate Shaft) bearing supports the rotating shaft that drives the camshafts. In early M96 engines, the bearing design is prone to wear, lubrication issues and seal degradation, which can lead to sudden catastrophic engine failure. Upgrading to this improved bearing system significantly enhances longevity, durability and lubrication stability, giving 987.1 Boxster owners peace of mind and extended engine life.

What This IMS Bearing Upgrade Kit Does

This kit provides:

• A reinforced, upgraded IMS bearing assembly designed to replace the vulnerable early M96 version
  
• Higher load capacity for improved resistance to wear
  
• Enhanced lubrication performance, reducing friction and heat
  
• A complete installation set including clamps, hardware, gaskets and sleeves
  
• Protection against bearing collapse, a leading cause of engine failure
  
• A smoother, more stable camshaft drive Long-term engine reliability, particularly important for daily and spirited driving

Perfect for professional workshops or specialists performing preventative maintenance on early 987.1 manual engines.

Why IMS Bearings Fail in Early Porsche M96 Engines

The early design is susceptible to:

• Lubrication wash-out, causing bearing overheating
  
• Seal deterioration, resulting in grease loss
  
• Contaminants entering the bearing housing
• High RPM vibration, accelerating fatigue
  
• Axial and radial load stress, beyond what the original bearing can handle
  
• Age-related failure, especially above 50–80k miles

Often, the engine gives little or no warning before failure.

Why the IMS Bearing Should Be Upgraded on 987.1 Boxster

Replacing the original bearing with the upgraded 99610590102EPS kit ensures:

• Greatly reduced risk of catastrophic engine failure
• Smoother engine operation and increased longevity
• Better lubrication and thermal management
• A complete installation with all necessary ancillaries
• Confidence for long-term ownership
• Improved reliability for both road use and track driving

This upgrade is widely regarded as critical preventative maintenance for Porsche M96-powered 987.1 models.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

IMSKIT987TIP.1

The product you are viewing cross references to these numbers

62mm Flange IMS Bearing Upgrade Kit for “Closed” Engines with Full Ancillaries – The Ultimate Eternal Fix for Porsche 987.1 Boxster / Cayman Manual Models

MUST USE OUR BORING TOOL IN ORDER TO INSTALL - the boring tool can be purchased or rented from us

This IMS bearing upgrade kit is engineered specifically for Porsche 987.1 Boxster / Cayman manual cars with M97 intermediate shaft housings. This version is the Eternal Fix, a patented and significantly stronger alternative to ball-bearing-based designs. The kit includes a 62mm cylindrical IMS bearing with thrust control, plus all required ancillaries—hardware, exhaust clamps, sleeves, seals and fittings—ensuring a complete and professional installation.

Fits:

• Porsche Boxster 987 2.7L 2005 -08/08
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• Porsche Cayman 2.7L 987C 2006-08
• Porsche Cayman S 3.4L 987C 2005-08

Designed for “closed” engines, this IMS solution must be installed using a dedicated boring tool, allowing the bearing assembly to be pressed directly into the back of the engine without full teardown.

The Early 987.1 engines using the 62mm closed bearing are particularly vulnerable to IMS wear, lubrication issues and axial loading. The EPS cylindrical bearing design eliminates these weaknesses by separating axial load from radial load, making this the only true long-term IMS cure rather than a temporary replacement.

What This IMS Upgrade Kit Does

This advanced IMS upgrade:

• Permanently eliminates the weak factory-style ball bearing
• Uses a patented cylindrical roller bearing with dramatically higher load capacity
  
• Separates axial and radial loads to prevent premature bearing overload
  
• Improves lubrication via a dedicated oil-pressure feed kit
  
• Protects the intermediate shaft and cam drive system
• Allows installation without full engine disassembly (when used with the correct boring tool)

Includes hardware, sleeves, exhaust clamps and seals for a complete upgrade

Designed for long-term reliability and motorsport-level durability.

Why the Original IMS Bearings Fail (Especially on 62mm Closed Engines)

Typical causes include:

• Ball bearing fatigue, leading to sudden collapse
  
• Axial load overload, which ball bearings cannot handle
  
• Oil contamination or lack of sufficient lubrication
• Heat cycling and material fatigue
• Seal degradation, allowing lubrication to escape

Design limitations of the early intermediate shaft system

Closed-style engines are especially susceptible because the bearing is not easily inspectable and operates under higher load.

Why the Eternal Fix IMS Upgrade Is the Best Solution

This patented system offers:

• Over 12× the load capacity of traditional ball-bearing IMS solutions
• True separation of radial and axial loads, preventing roller overload
  
• A bearing that does not rely on side-loading, unlike conventional cylindrical or ball bearings
  
• An oil-fed outer race, ensuring stable lubrication
  
• A lifetime-capable design, not a service interval part
  
• A 5-year warranty for confidence and peace of mind
  
• Compatibility with closed engines using a precise boring tool

It is engineered to outlast the engine itself, making it the ultimate preventative upgrade for Porsche 987.1 Boxster / Cayman, manual cars.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

IMSKIT987MAN.3

The product you are viewing cross references to these numbers

IMS Bearing Upgrade Kit with 58mm Flange for “Open” Engines (doing an engine rebuild) with Complete Ancillaries – Essential Reliability Upgrade for Porsche 987.1 Boxster / Cayman Manual Models

This 58mm flange IMS bearing upgrade kit is specifically engineered for Porsche 987.1Boxster / Cayman, manual cars fitted with M97 intermediate shaft bearings. Supplied as a complete installation package, the kit includes a strengthened bearing assembly, fresh mounting hardware, seals, exhaust clamps, sleeves and all additional ancillaries needed to complete the upgrade in one comprehensive service.

Fits:

• Porsche Boxster 987 2.7L 2005 -08/08
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• Porsche Cayman 2.7L 987C 2006-08
• Porsche Cayman S 3.4L 987C 2005-08

(Not for M96 Engines)

The IMS (Intermediate Shaft) bearing supports the intermediate shaft that drives the camshafts. When the original bearing design deteriorates, it can fail without warning—leading to catastrophic engine damage. Upgrading to a modern, precision-engineered bearing significantly improves durability and long-term reliability, making this kit one of the most important preventative maintenance investments for these Porsche models.

What the IMS Bearing Upgrade Kit Does

This complete kit:

• Replaces the vulnerable original IMS bearing with a fortified, precision-engineered alternative
  
• Reduces friction and improves lubrication stability
• Protects the intermediate shaft from premature wear
• Prevents metal debris contamination inside the engine
• Restores confidence in long-term engine reliability
• Includes all necessary hardware, clamps, sleeves and seals for a seamless installation

Designed to meet the demands of both road use and high-performance driving.

Why IMS Bearings Fail in Porsche M97 Engines

Common causes include:

• Lubrication starvation, leading to ball bearing scoring
  
• Seal degradation, causing grease loss and overheating
  
• Contaminants entering the bearing assembly
• High engine speeds, accelerating wear
  
• Age-related material fatigue
• Inadequate internal lubrication flow in the early intermediate shaft design

Symptoms are often subtle—or non-existent—until severe engine damage has occurred.

Why the IMS Bearing Should Be Upgraded

Upgrading the IMS bearing provides:

• Prevention of catastrophic bearing failure
• Significant extension of engine lifespan
• Peace of mind for owners of 996/997/986/987 models
• A stronger, more stable bearing with improved lubrication path
• Reduction in maintenance costs over time
• A complete installation solution thanks to included ancillaries

This kit is essential for any Porsche owner planning long-term stewardship, spirited driving, or engine rebuild work.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

IMSKIT987MAN.2

The product you are viewing cross references to these numbers

IMS Bearing Upgrade Kit with Full Ancillaries – Essential Protection for Early Porsche 987.1 Boxster, Manual with M96 Engines

This IMS bearing upgrade kit is engineered for early Porsche 987.1 Boxster / Boxster S manual models equipped with the M96 engine, providing a reliable solution to one of the platform’s most well-known weak points—the original intermediate shaft bearing. The kit includes the upgraded IMS bearing along with all required ancillaries, such as exhaust clamps, sleeves, installation hardware, seals and mounting components, ensuring a complete and efficient upgrade process.

Fits:

• Porsche Boxster 987 2.7L 2005-2006
• Porsche Boxster 987 S 3.2L 2005-2006

The IMS (Intermediate Shaft) bearing supports the rotating shaft that drives the camshafts. In early M96 engines, the bearing design is prone to wear, lubrication issues and seal degradation, which can lead to sudden catastrophic engine failure. Upgrading to this improved bearing system significantly enhances longevity, durability and lubrication stability, giving 987.1 Boxster owners peace of mind and extended engine life.

What This IMS Bearing Upgrade Kit Does

This kit provides:

• A reinforced, upgraded IMS bearing assembly designed to replace the vulnerable early M96 version
  
• Higher load capacity for improved resistance to wear
  
• Enhanced lubrication performance, reducing friction and heat
  
• A complete installation set including clamps, hardware, gaskets and sleeves
  
• Protection against bearing collapse, a leading cause of engine failure
  
• A smoother, more stable camshaft drive Long-term engine reliability, particularly important for daily and spirited driving

Perfect for professional workshops or specialists performing preventative maintenance on early 987.1 manual engines.

Why IMS Bearings Fail in Early Porsche M96 Engines

The early design is susceptible to:

• Lubrication wash-out, causing bearing overheating
  
• Seal deterioration, resulting in grease loss
  
• Contaminants entering the bearing housing
• High RPM vibration, accelerating fatigue
  
• Axial and radial load stress, beyond what the original bearing can handle
  
• Age-related failure, especially above 50–80k miles

Often, the engine gives little or no warning before failure.

Why the IMS Bearing Should Be Upgraded on 987.1 Boxster

Replacing the original bearing with the upgraded 99610590102EPS kit ensures:

• Greatly reduced risk of catastrophic engine failure
• Smoother engine operation and increased longevity
• Better lubrication and thermal management
• A complete installation with all necessary ancillaries
• Confidence for long-term ownership
• Improved reliability for both road use and track driving

This upgrade is widely regarded as critical preventative maintenance for Porsche M96-powered 987.1 models.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

IMSKIT987MAN.1

The product you are viewing cross references to these numbers

IMS Bearing Upgrade Kit with Full Ancillaries – Essential Reliability Upgrade for 986 Boxster 2.7ltr / Boxster S 3.2ltr  with Tiptronic Gearbox

This IMS bearing upgrade kit includes everything needed to replace and enhance the intermediate shaft bearing in the Porsche 986 Boxster 2.5ltr with M96 engines. This complete package includes the upgraded bearing assembly, new hardware, seals, exhaust clamps, sleeves and all required ancillaries to streamline installation.

Fits:

• Porsche Boxster 986 2.7L 1999-02
• Porsche Boxster S 986 3.2L 1999-02
• Porsche Boxster 986 2.7L 2003-04
• Porsche Boxster S 986 3.2L 2003-04

The IMS (Intermediate Shaft) bearing supports the intermediate shaft that drives the camshafts. When the original bearing design deteriorates, it can fail without warning—leading to catastrophic engine damage. Upgrading to a modern, precision-engineered bearing significantly improves durability and long-term reliability, making this kit one of the most important preventative maintenance investments for these Porsche models.

What the IMS Bearing Upgrade Kit Does

This complete kit:

• Replaces the vulnerable original IMS bearing with a fortified, precision-engineered alternative
  
• Reduces friction and improves lubrication stability
• Protects the intermediate shaft from premature wear
• Prevents metal debris contamination inside the engine
• Restores confidence in long-term engine reliability
• Includes all necessary hardware, clamps, sleeves and seals for a seamless installation

Designed to meet the demands of both road use and high-performance driving.

Why IMS Bearings Fail in Porsche M96 Engines

Common causes include:

• Lubrication starvation, leading to ball bearing scoring
  
• Seal degradation, causing grease loss and overheating
  
• Contaminants entering the bearing assembly
• High engine speeds, accelerating wear
  
• Age-related material fatigue
• Inadequate internal lubrication flow in the early intermediate shaft design

Symptoms are often subtle—or non-existent—until severe engine damage has occurred.

Why the IMS Bearing Should Be Upgraded

Upgrading the IMS bearing provides:

• Prevention of catastrophic bearing failure
• Significant extension of engine lifespan
• Peace of mind for owners of 986 Boxster models
• A stronger, more stable bearing with improved lubrication path
• Reduction in maintenance costs over time
• A complete installation solution thanks to included ancillaries

This kit is essential for any Porsche owner planning long-term stewardship, spirited driving, or engine rebuild work.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

IMSKIT986TIP.2

The product you are viewing cross references to these numbers

IMS Bearing Upgrade Kit with Full Ancillaries – Essential Reliability Upgrade for 986 Boxster 2.7ltr /Boxster S with Manual Gearbox

This IMS bearing upgrade kit includes everything needed to replace and enhance the intermediate shaft bearing in the Porsche 986 Boxster 2.7ltr and Boxster S S 3.2ltr with M96 engines. This complete package includes the upgraded bearing assembly, new hardware, seals, exhaust clamps, sleeves and all required ancillaries to streamline installation.

Fits:

• Porsche Boxster 986 2.7L 1999-02
  
• Porsche Boxster S 986 3.2L 1999-02
• Porsche Boxster 986 2.7L 2003-04
• Porsche Boxster S 986 3.2L 2003-04

The IMS (Intermediate Shaft) bearing supports the intermediate shaft that drives the camshafts. When the original bearing design deteriorates, it can fail without warning—leading to catastrophic engine damage. Upgrading to a modern, precision-engineered bearing significantly improves durability and long-term reliability, making this kit one of the most important preventative maintenance investments for these Porsche models.

What the IMS Bearing Upgrade Kit Does

This complete kit:

• Replaces the vulnerable original IMS bearing with a fortified, precision-engineered alternative
  
• Reduces friction and improves lubrication stability
• Protects the intermediate shaft from premature wear
• Prevents metal debris contamination inside the engine
• Restores confidence in long-term engine reliability
• Includes all necessary hardware, clamps, sleeves and seals for a seamless installation

Designed to meet the demands of both road use and high-performance driving.

Why IMS Bearings Fail in Porsche M96 Engines

Common causes include:

• Lubrication starvation, leading to ball bearing scoring
  
• Seal degradation, causing grease loss and overheating
  
• Contaminants entering the bearing assembly
• High engine speeds, accelerating wear
  
• Age-related material fatigue
• Inadequate internal lubrication flow in the early intermediate shaft design

Symptoms are often subtle—or non-existent—until severe engine damage has occurred.

Why the IMS Bearing Should Be Upgraded

Upgrading the IMS bearing provides:

• Prevention of catastrophic bearing failure
• Significant extension of engine lifespan
• Peace of mind for owners of 986 Boxster models
• A stronger, more stable bearing with improved lubrication path
• Reduction in maintenance costs over time
• A complete installation solution thanks to included ancillaries

This kit is essential for any Porsche owner planning long-term stewardship, spirited driving, or engine rebuild work.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

IMSKIT986MAN.2

The product you are viewing cross references to these numbers

Keep your Porsche 993 performing like new with this comprehensive service kit, combining trusted aftermarket components.

Fits:
Porsche 993 Carrera 1994-97
Porsche 993 Carrera 4 1995-97
Porsche 993 Carrera S 1997-98
Porsche 993 Carrera 4S 1996-98
Porsche 993 Carrera RS 1995-96

Kit Contents:

1x Oil Filter (Thermostat Console) – Part No. 99320720103
1x Oil Filter (Crankcase) - Part No. 99310720305
1x O-Ring for Oil Drain Plug (Thermostat Console) - Part No.  99970126940
1x Fuel Filter – Part No. 92811025307
1x Air Filter Element – Part No. 99311032701
2x Dust & Pollen Filter Element - Part No. 99357247900
2x Oil Drain Plug Crush Washers – Part No. 90012311830
12x NGK Spark Plugs – Part No. 99917018390

Tailor Your Kit to Fit Your Needs:

Not ready to replace parts like spark plugs or the fuel filter? No problem. Before checkout, you can remove individual components to customise the kit to your specific needs.

Want to add more? When you add this kit to your basket, you'll also have the option to include additional parts such as a camshaft cover gasket set, engine oil, fan belt, and more - so you get exactly what your vehicle requires.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

SERVICEKIT.993.1.MAH

The product you are viewing cross references to these numbers

IMS Bearing Upgrade Kit with Full Ancillaries – Essential Reliability Upgrade for 986 Boxster 2.5ltr  with Tiptronic Gearbox

This IMS bearing upgrade kit includes everything needed to replace and enhance the intermediate shaft bearing in the Porsche 986 Boxster 2.5ltr with M96 engines. This complete package includes the upgraded bearing assembly, new hardware, seals, exhaust clamps, sleeves and all required ancillaries to streamline installation.

Fits:

• Porsche Boxster 986 2.5L 1997-99

The IMS (Intermediate Shaft) bearing supports the intermediate shaft that drives the camshafts. When the original bearing design deteriorates, it can fail without warning—leading to catastrophic engine damage. Upgrading to a modern, precision-engineered bearing significantly improves durability and long-term reliability, making this kit one of the most important preventative maintenance investments for these Porsche models.

What the IMS Bearing Upgrade Kit Does

This complete kit:

• Replaces the vulnerable original IMS bearing with a fortified, precision-engineered alternative
  
• Reduces friction and improves lubrication stability
• Protects the intermediate shaft from premature wear
• Prevents metal debris contamination inside the engine
• Restores confidence in long-term engine reliability
• Includes all necessary hardware, clamps, sleeves and seals for a seamless installation

Designed to meet the demands of both road use and high-performance driving.

Why IMS Bearings Fail in Porsche M96 Engines

Common causes include:

• Lubrication starvation, leading to ball bearing scoring
  
• Seal degradation, causing grease loss and overheating
  
• Contaminants entering the bearing assembly
• High engine speeds, accelerating wear
  
• Age-related material fatigue
• Inadequate internal lubrication flow in the early intermediate shaft design

Symptoms are often subtle—or non-existent—until severe engine damage has occurred.

Why the IMS Bearing Should Be Upgraded

Upgrading the IMS bearing provides:

• Prevention of catastrophic bearing failure
• Significant extension of engine lifespan
• Peace of mind for owners of 986 Boxster models
• A stronger, more stable bearing with improved lubrication path
• Reduction in maintenance costs over time
• A complete installation solution thanks to included ancillaries

This kit is essential for any Porsche owner planning long-term stewardship, spirited driving, or engine rebuild work.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

IMSKIT986TIP.1

The product you are viewing cross references to these numbers

Keep your Porsche 996 Carrera 3.6L performing at its best with this comprehensive service kit. 

Fits:
Porsche 996 Carrera 2 3.6L 
Porsche 996 Carrera 4 3.6L

Kit Contents:

1x Oil Filter – Part No. 99610722560
1x Fuel Filter – Part No. 99611025301
1x Air Filter Element – Part No. 99611013152
1x Pollen Filter Element – Part No. 99757121902
1x Oil Drain Plug Crush Washer – Part No. 90012310630
6x Bosch Spark Plugs – Part No. 99917022390

Tailor Your Kit to Fit Your Needs:

Not ready to replace parts like spark plugs or the fuel filter? No problem. Before checkout, you can remove individual components to customise the kit to your specific needs.

Want to add more? When you add this kit to your basket, you'll also have the option to include additional parts such as engine oil, ignition coils and more - so you get exactly what your vehicle requires.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

SERVICEKIT.996.2.OEM1

The product you are viewing cross references to these numbers

Keep your Porsche 996 Carrera 3.4L performing at its best with this comprehensive service kit. 

Fits:
Porsche 996-1 Carrera 2 3.4L 1998-01
Porsche 996-1 Carrera 4 3.4L 1998-01

Kit Contents:

1x Oil Filter – Part No. 99610722560
1x Fuel Filter – Part No. 99611025301
1x Air Filter Element – Part No. 99611013152
1x Pollen Filter Element – Part No. 99757121902
1x Oil Drain Plug Crush Washer – Part No. 90012310630
6x Bosch Spark Plugs – Part No. 99917020791

Tailor Your Kit to Fit Your Needs:

Not ready to replace parts like spark plugs or the fuel filter? No problem. Before checkout, you can remove individual components to customise the kit to your specific needs.

Want to add more? When you add this kit to your basket, you'll also have the option to include additional parts such as engine oil, ignition coils and more - so you get exactly what your vehicle requires.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

SERVICEKIT.996.1.OEM1

The product you are viewing cross references to these numbers

IMS Bearing Upgrade Kit with Full Ancillaries – Essential Reliability Upgrade for 986 Boxster 2.5ltr  with Manual Gearbox

This IMS bearing upgrade kit includes everything needed to replace and enhance the intermediate shaft bearing in the Porsche 986 Boxster 2.5ltr with M96 engines. This complete package includes the upgraded bearing assembly, new hardware, seals, exhaust clamps, sleeves and all required ancillaries to streamline installation.

Fits:

• Porsche Boxster 986 2.5L 1997-99

The IMS (Intermediate Shaft) bearing supports the intermediate shaft that drives the camshafts. When the original bearing design deteriorates, it can fail without warning—leading to catastrophic engine damage. Upgrading to a modern, precision-engineered bearing significantly improves durability and long-term reliability, making this kit one of the most important preventative maintenance investments for these Porsche models.

What the IMS Bearing Upgrade Kit Does

This complete kit:

• Replaces the vulnerable original IMS bearing with a fortified, precision-engineered alternative
  
• Reduces friction and improves lubrication stability
• Protects the intermediate shaft from premature wear
• Prevents metal debris contamination inside the engine
• Restores confidence in long-term engine reliability
• Includes all necessary hardware, clamps, sleeves and seals for a seamless installation

Designed to meet the demands of both road use and high-performance driving.

Why IMS Bearings Fail in Porsche M96 Engines

Common causes include:

• Lubrication starvation, leading to ball bearing scoring
  
• Seal degradation, causing grease loss and overheating
  
• Contaminants entering the bearing assembly
• High engine speeds, accelerating wear
  
• Age-related material fatigue
• Inadequate internal lubrication flow in the early intermediate shaft design

Symptoms are often subtle—or non-existent—until severe engine damage has occurred.

Why the IMS Bearing Should Be Upgraded

Upgrading the IMS bearing provides:

• Prevention of catastrophic bearing failure
• Significant extension of engine lifespan
• Peace of mind for owners of 986 Boxster models
• A stronger, more stable bearing with improved lubrication path
• Reduction in maintenance costs over time
• A complete installation solution thanks to included ancillaries

This kit is essential for any Porsche owner planning long-term stewardship, spirited driving, or engine rebuild work.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

IMSKIT986MAN.1

The product you are viewing cross references to these numbers

Crankcase Breather System (Air/Oil Separator)

The crankcase breather system, also known as the air/oil separator (AOS), is a critical engine component that should be replaced every 30,000 miles—or sooner if signs of failure appear.

When the system fails, it can cause:

• Vacuum leaks due to cracked hoses or a damaged air/oil separator
• Oil consumption and fouled spark plugs, as oil is drawn into the intake
• Increased crankcase pressure, which can lead to gasket leaks and other engine issues

Preventative Maintenance

Preventative maintenance is always the best approach. Our comprehensive Crankcase Breather Hose Kit includes all the components you need to replace the system properly. We also recommend performing an engine oil change at the same time to ensure peak performance and longevity.

The AOS is basically a small diaphragm distillery which distills the minute amounts of oil mist in the crankcase, liquifies it and sends it back to the crankcase. The "clean" air is now sent into the air intake (after the throttle body) to be burned off by the engine.

When the AOS starts to fail it cannot separate all of the oil out of the mist and some liquid oil is sent to the air intake.

A few drops of oil is enough to generate the GREAT SMOKE BOMB for which our cars are famous for.

A big smoke bomb once in a while is completely normal, due to the architecture of the flat-6 engine, which may let a drop of oil flow into one of the combustion chambers sporadically.

Fits:
Porsche 997 C2 3.6L
Porsche 997 C4 3.6L 

Click pictures for large parts diagram.
Diagram Ref No 1, 4 , 5 

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

OILSEPARATOR.997.1.OEM

The product you are viewing cross references to these numbers

Crankcase Breather System (Air/Oil Separator)

The crankcase breather system, also known as the air/oil separator (AOS), is a critical engine component that should be replaced every 30,000 miles—or sooner if signs of failure appear.

When the system fails, it can cause:

• Vacuum leaks due to cracked hoses or a damaged air/oil separator
• Oil consumption and fouled spark plugs, as oil is drawn into the intake
• Increased crankcase pressure, which can lead to gasket leaks and other engine issues

Preventative Maintenance

Preventative maintenance is always the best approach. Our comprehensive Crankcase Breather Hose Kit includes all the components you need to replace the system properly. We also recommend performing an engine oil change at the same time to ensure peak performance and longevity.

The AOS is basically a small diaphragm distillery which distills the minute amounts of oil mist in the crankcase, liquifies it and sends it back to the crankcase. The "clean" air is now sent into the air intake (after the throttle body) to be burned off by the engine.

When the AOS starts to fail it cannot separate all of the oil out of the mist and some liquid oil is sent to the air intake.

A few drops of oil is enough to generate the GREAT SMOKE BOMB for which our cars are famous for.

A big smoke bomb once in a while is completely normal, due to the architecture of the flat-6 engine, which may let a drop of oil flow into one of the combustion chambers sporadically.

Fits:
Porsche 996 C2 3.6L
Porsche 996 C4 3.6L 
Porsche 996 C4S 3.6L

Parts included are: 

• 1 x AOS Oil / air separator. Porsche 996 3.4L (ref 99610702355)
• 1 x Oil separator breather hose. Porsche 996 3.4L >>2001 (ref 99610714555)
• 1 x Crankcase breather hose. Porsche Boxster 986 >>2002 / 996 (ref 99610714755)
• 1 x Oil / Air Separator Boot Clamp. Porsche 986 Boxster / 996 >>2001 (ref 99951263000)
• 1 x Oil / Air Separator Boot for Porsche 996 3.4L 1998-02 / Boxster 986 - (ref 99610723752)

Click pictures for large parts diagram.
Diagram Ref No 1, 4 , 5 

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

OILSEPARATOR.996.2.OEM

The product you are viewing cross references to these numbers

Oil / Air Separator kit.
This kit is the complete factory-specified breathing and oil-vapour separation system for the 987.2 Boxster and Cayman engines. It comprises the oil-separator unit, two vent valves, and all necessary hoses. Together, they ensure the crankcase is ventilated properly, blow-by vapours are separated, and only clean, oil-free air is recirculated or vented.

Fits:
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.2 Cayman 2009 - 2012

Diagram ref no 15 (Oil separator)
Diagram ref no 3, 4, 5 and 8

Kit Contents:
1× 0PB115099A - Air-Oil Separator (AOS) body / main separator unit
1× 9A110503801 - Crankcase Vent Valve (cylinders 4–6)
1× 9A110503900 - Crankcase Vent Valve (cylinders 1–3)
1× 9A110752002 - Crankcase Vent Hose / Breather Line
1× 9A110751501 - Additional Crankcase Breather Hose (or secondary vent line)

Recommended when replacing the AOS system, during engine maintenance, or when experiencing symptoms of AOS failure (oil consumption, smoke, vapour in intake, etc.).

Replace all components together as a kit for best sealing, balance, and long-term reliability.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

OILSEPARATOR.987.2.OEM

The product you are viewing cross references to these numbers

Oil / Air Separator kit.
This kit is the complete factory-specified breathing and oil-vapour separation system for the 981 Boxster and Cayman engines. It comprises the oil-separator unit, two vent valves, and all necessary hoses. Together, they ensure the crankcase is ventilated properly, blow-by vapours are separated, and only clean, oil-free air is recirculated or vented.

Fits:
Porsche 981 Boxster 2012 - 2016
Porsche 981 Boxster Spyder 2016>>
Porsche 982 Boxster GTS 4.0L 2017>>
Porsche 981C Cayman 2014 - 2016
Porsche 981C Cayman GT4 2016>>
Porsche 982C Cayman GT4 4.0L 2017>>

Diagram ref no 12 (Oil separator)
Diagram ref no 1, 2, 12 and 14.

Kit Contents:
1× 0PB115099A - Air-Oil Separator (AOS) body / main separator unit
1× 9A110503801 - Crankcase Vent Valve (cylinders 4–6)
1× 9A110503900 - Crankcase Vent Valve (cylinders 1–3)
1× 9A110752020 - Crankcase Vent Hose / Breather Line
1× 9A110751501 - Additional Crankcase Breather Hose (or secondary vent line)

Recommended when replacing the AOS system, during engine maintenance, or when experiencing symptoms of AOS failure (oil consumption, smoke, vapour in intake, etc.).

Replace all components together as a kit for best sealing, balance, and long-term reliability.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

OILSEPARATOR.981.OEM

The product you are viewing cross references to these numbers