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Porsche > Boxster 986/987/981 (1997-2016) > Boxster 987 MKII 2.9L 2009-2012 > Engine Rebuild Parts >

Engine Mounts

Engine Mounts

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DISPLAYING 1 to 9 (of 9 products)
Engine Mount Stop. Porsche 987 Boxster / 987 Cayman - 9A137525701, 98737525503, 98737525505
4
Engine Mount Stop. Porsche 987 Boxster / 987 Cayman
Special Order item
9A137525701
Product Information
Product Information
Engine Mount Stop.
porsche

Fits:
Porsche 987 Boxster / S 2005-08
Porsche 987 Boxster / S 2009-12
Porsche 987C Cayman / S 2005-08
Porsche 987C Cayman / S 2009-12

This product supersedes Porsche's old part numbers:
- 98737525503
- 98737525505

Price is for each.

Click 'Zoom in' for large parts diagram.
Diagram Ref No 3

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Related, superseded, cross reference or alternative numbers for comparison.

9A137525701
9A137525701
98737525503
98737525505

The product you are viewing cross references to these numbers
Engine Suspension Bracket. Porsche 987 MKII Boxster / 987 Cayman MKII - 9A137502322
4
Engine Suspension Bracket. Porsche 987 MKII Boxster / 987 Cayman MKII
Special Order item
9A137502322
Product Information
Product Information
Engine Suspension Bracket.

 
Fits:
Porsche 987 Boxster / S 2009-12
Porsche 987C Cayman / S 2009-12

Diagram ref no 2



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Related, superseded, cross reference or alternative numbers for comparison.

9A137502322
9A137502322

The product you are viewing cross references to these numbers
Engine Suspension Bracket. Porsche 987 MKII Boxster / 987 Cayman MKII - 9A137502322
4
Engine Suspension Bracket. Porsche 987 MKII Boxster / 987 Cayman MKII
9A137502322/1
Product Information
Product Information

Engine mount
Keep your vehicle running smoothly with this high-quality engine mount designed to match OEM standards for durability and performance. The engine mount (also known as a motor mount) plays a vital role in supporting your engine and isolating vibration from the chassis.

Fits:
Porsche Boxster 987 MKII 2.9L 2009-2012
Porsche Boxster S 987 MKII 3.4L 2009-2012
Porsche Cayman 2.9L 987C MKII 2009-12
Porsche Cayman S / R 3.4L 987C MKII 2009-12

Diagram ref no 1

Product Overview
This precision-engineered engine mount securely holds your engine in place while absorbing vibrations and road shocks. Manufactured from high-grade steel and vibration-resistant rubber or hydraulic components, it ensures long service life even under demanding driving conditions.

Key Features & Benefits

  • OEM-equivalent performance – Direct replacement for part number 9A137502322.
  • Enhanced vibration isolation – Reduces cabin noise and harshness for a smoother, quieter drive.
  • Durable construction – Corrosion-resistant housing with high-quality bonding for long life.
  • Precision fit – Matches factory specifications for fast, trouble-free installation.
  • Improves ride quality and handling – Maintains correct engine position and drivetrain geometry.
  • Prevents costly damage – Reduces stress on exhaust systems, hoses, and electrical wiring.


Symptoms of a Worn or Failing Engine Mount - If your engine mount is worn, you may notice:

  • Excessive vibration or shaking at idle or during acceleration.
  • Clunking or knocking noises when shifting gears or accelerating.
  • Engine movement or rocking under load.
  • Visible cracks or leaks in the rubber or hydraulic fluid.
  • A sagging or misaligned engine in the bay.

These symptoms suggest it’s time for replacement before further damage occurs.

Common Causes of Failure - Engine mounts naturally wear out due to:

  • Age and fatigue (rubber hardens, cracks, or loses elasticity).
  • Oil or coolant leaks that deteriorate the rubber.
  • Harsh driving or torque loads from aggressive acceleration.
  • Incorrect installation or over-tightened fasteners.
  • Corrosion on the mounting brackets or bolts.


Why Replace an Engine Mount? - Replacing your mount restores stability, comfort, and safety.

  • Prevents engine movement that can damage hoses or wiring.
  • Reduces vibration and noise inside the cabin.
  • Maintains alignment of the drivetrain and transmission.
  • Avoids premature wear on suspension and steering components.
  • Restores factory ride comfort and performance feel.

 

Quality You Can Trust
All mounts are manufactured to OEM or higher standards, tested for vibration resistance, and backed by our quality guarantee. Replace both left and right mounts if necessary for balanced support and maximum longevity.



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

9A137502322
9A137502322

The product you are viewing cross references to these numbers
Front engine mount bush. Porsche 987.2/981 Boxster and Cayman 2009>> Powerflex - PFR57-820, 9A137504601, 9A137502322
4
Front engine mount bush. Porsche 987.2/981 Boxster and Cayman 2009>> Powerflex
PFR57-820
Product Information
Product Information
Powerflex Front engine mount bush.

powerflex

PFR57-820 fits all models from 2009 onwards. For any models before this, please use PFR57-520.

OEM Part Number: 9A137504601
OEM Part Number: 9A137502322

Fits:
Porsche 987.2 Boxster 2009-2012
Porsche 987C.2 Cayman 2009-2012
Porsche 981 Boxster 2012-16
Porsche 981C Cayman 2014-2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 20

Powerflex. Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:

- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components

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

PFR57-820
PFR57-820
9A137504601
9A137502322

The product you are viewing cross references to these numbers
Front engine mount bush. Porsche 987.2/981 Boxster and Cayman 2009>> Powerflex Black Series - PFR57-820, 9A137504601, 9A137502322
4
Front engine mount bush. Porsche 987.2/981 Boxster and Cayman 2009>> Powerflex Black Series
PFR57-820BLK
Product Information
Product Information
Powerflex Black Series Front engine mount bush.

powerflexblk

PFR57-820BLK fits all models from 2009 onwards. For any models before this, please use PFR57-520BLK.

OEM Part Number: 9A137504601
OEM Part Number: 9A137502322

Fits:
Porsche 987.2 Boxster 2009-2012
Porsche 987C.2 Cayman 2009-2012
Porsche 981 Boxster 2012-16
Porsche 981C Cayman 2014-2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 20

Powerflex Black Series- Designed for the Track - Ready to Race - Engineered to be the best.

Powerflex Black Series bushes are manufactured using a 95 Shore A compound to provide maximum control of chassis geometry. This compound can be up to 80% more resistant to load than standard rubber and 25% stiffer than our purple performance material.

If your requirements are purely for the ultimate in handling and chassis performance then Powerflex Black Series are unique, offering the most precise and accurate alignment for your chassis.

Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:

- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components.

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

PFR57-820BLK
PFR57-820
9A137504601
9A137502322

The product you are viewing cross references to these numbers
Front engine mount insert. Porsche 987.2/ 981 Boxster and Cayman 2009>> Powerflex - PFR57-821, 9A137504601, 9A137502322
6
Front engine mount insert. Porsche 987.2/ 981 Boxster and Cayman 2009>> Powerflex
PFR57-821
Product Information
Product Information
Powerflex Front engine mount insert.

powerflex

PFR57-821 fits all models from 2009 onwards. For any models before this, please use PFR57-521.

OEM Part Number: 9A137502322
OEM Part Number: 9A137504601

Fits:
Porsche 987.2 Boxster 2009-2012
Porsche 987C.2 Cayman 2009-2012
Porsche 981 Boxster 2012-16
Porsche 981C Cayman 2014-2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 20

Powerflex. Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:

- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components

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

PFR57-821
PFR57-821
9A137504601
9A137502322

The product you are viewing cross references to these numbers
Front engine mount insert. Porsche 987.2/981 Boxster and Cayman 2009>> Powerflex Black Series - PFR57-821, 9A137504601, 9A137502322
6
Front engine mount insert. Porsche 987.2/981 Boxster and Cayman 2009>> Powerflex Black Series
PFR57-821BLK
Product Information
Product Information
Powerflex Black Series Front engine mount insert.

powerflexblk

PFR57-821BLK fits all models from 2009 onwards. For any models before this, please use PFR57-521BLK.

OEM Part Number: 9A137502322
OEM Part Number: 9A137504601

Fits:
Porsche 987.2 Boxster 2009-2012
Porsche 987C.2 Cayman 2009-2012
Porsche 981 Boxster 2012-16
Porsche 981C Cayman 2014-2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 20

Powerflex Black Series - Designed for the Track - Ready to Race - Engineered to be the best.

Powerflex Black Series bushes are manufactured using a 95 Shore A compound to provide maximum control of chassis geometry. This compound can be up to 80% more resistant to load than standard rubber and 25% stiffer than our purple performance material.

If your requirements are purely for the ultimate in handling and chassis performance then Powerflex Black Series are unique, offering the most precise and accurate alignment for your chassis.

Replacing your car rubber suspension bushes with Polyurethane Suspension Bushes will give you:

- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components

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

PFR57-821BLK
PFR57-821
9A137504601
9A137502322

The product you are viewing cross references to these numbers
Hexagon Nut M10. - PAF008868, 99907605301, 99907605309
2
Hexagon Nut M10.
Special Order item
PAF008868
Product Information
Product Information

The M10 hex nut is a versatile, high-strength fastener used across a wide range of Porsche models and assemblies. From suspension links to engine brackets, exhaust components, body fittings, and drivetrain hardware, this M10 nut ensures secure fastening and reliable torque retention where precision and durability are essential.

Manufactured to meet stringent automotive engineering standards, this nut provides excellent resistance to vibration, temperature variation, and long-term mechanical stress. Whether carrying out routine maintenance, restoring a classic model, or replacing aged hardware, this M10 hex nut is an essential component for maintaining structural integrity and correct assembly torque throughout your Porsche.

What Do M10 Hex Nuts Do?

M10 hex nuts are critical fasteners used to clamp, secure, and stabilise components throughout the vehicle.

Core Functions:
Provide secure threaded fastening in suspension, engine, exhaust, and chassis assemblies.
Maintain clamping force during high-load or high-vibration conditions.
Support correct alignment of mechanical components.
Ensure safety and structural strength across various mounting points.
Maintain torque settings essential for performance and reliability.

Why Do M10 Hex Nuts Fail?

Over time, fasteners experience wear, stress, and environmental exposure that can compromise their performance.

Common Causes of Failure Include:

  • Corrosion from moisture, salt, or road debris.
  • Thread wear from repeated installation or overtightening.
  • Loss of clamping force from heat cycling or vibration.
  • Rounded edges caused by incorrect tools or age.
  • Metal fatigue leading to cracking or deformation.

A compromised nut can lead to loose fastenings, misalignment, and in some cases, component damage or safety issues.

Why Replace or Upgrade Your M10 Hex Nuts?

Replacing aged or worn nuts ensures proper fastener tension and maintains the reliability of the components they secure.

Key Benefits:

  • Restores proper torque retention and fastening integrity.
  • Prevents vibration-related loosening and component failure.
  • Ensures corrosion resistance for long-term durability.
  • Suitable for multiple Porsche applications across generations.
  • Ideal for restoration projects, rebuilds, and preventative maintenance.
  • Precision-engineered for a perfect, secure fit.

Fresh hardware is particularly important when servicing high-stress areas such as suspension mounts, exhaust fixtures, and drivetrain assemblies.



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

PAF008868
PAF008868
99907605301
99907605309

The product you are viewing cross references to these numbers
Stud M10 x 83 engine and gearbox mounting. Porsche 986 / 996 / 997.1 / 997.1 turbo / 987 - 99906110609, 99906110601
2
Stud M10 x 83 engine and gearbox mounting. Porsche 986 / 996 / 997.1 / 997.1 turbo / 987
Special Order item
99906110601
Product Information
Product Information
Stud M10 x 83 engine and gearbox mounting. 

porsche

Fits:
Porsche 996 - 1997 to 2004
Porsche 997.1 -  2005 to 2008
Porsche 997.1 turbo - 2007 to 2008
Porsche 987 Boxster / Cayman - 2005 to 2012

Click 'Zoom in' for large parts diagram.
Diagram ref no 6



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

99906110601
99906110609
99906110601

The product you are viewing cross references to these numbers
DISPLAYING 1 to 9 (of 9 products)
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About Engine Mounts

Replacement Engine Mounts – Stability, Comfort, and Performance for Porsche Models

Engine mounts are the unsung heroes of your Porsche’s drivetrain, securing the engine to the chassis while absorbing vibration and maintaining precise alignment. Over time, these components can degrade from constant heat, torque, and road stress — affecting ride quality, handling, and drivetrain performance.

At Design911, we supply a wide selection of precision-engineered replacement engine mounts designed to the highest performance standards. Manufactured from high-grade rubber, polyurethane, or reinforced composite materials, these mounts provide the perfect balance of vibration isolation and structural support.

Whether you’re restoring a classic air-cooled model or maintaining a modern 911, manufacturer-quality mounts ensure smooth operation, improved comfort, and precise drivetrain alignment under all conditions.

What Do Engine Mounts Do?

Engine mounts secure the engine and transmission to the vehicle’s chassis, minimising movement while isolating vibrations that would otherwise transfer into the cabin.

Core Functions:

  • Securely position the engine and transmission within the chassis.
  • Absorb vibration and torque movement, improving comfort and handling.
  • Maintain drivetrain alignment for optimal power transfer.
  • Reduce stress on components such as hoses, wiring, and exhaust connections.

Well-fitted engine mounts preserve your Porsche’s distinctive refinement and handling precision, especially under high load or spirited driving.

Why Do Engine Mounts Fail?

Due to constant exposure to torque, heat, and vibration, engine mounts naturally degrade over time. Worn or broken mounts can lead to excessive engine movement, clunking noises, and vibration inside the cabin — symptoms that should never be ignored.

Common Causes of Engine Mount Failure Include:

  • Material fatigue from age or repeated heat cycling.
  • Oil contamination, softening rubber or polymer components.
  • Excessive engine torque or vibration, especially on tuned or high-mileage engines.
  • Corrosion or cracking in metal brackets or hardware.
  • Improper installation leading to uneven stress and premature wear.

Failing mounts compromise performance and comfort, causing drivetrain misalignment and potential damage to surrounding components.

Why Replace with Precision-Engineered Engine Mounts?

Upgrading to high-quality replacement engine mounts restores the stability, refinement, and handling balance your Porsche was designed for. Precision-engineered mounts ensure reliable load distribution, vibration damping, and improved driving comfort.

Key Benefits:

  • Restores drivetrain stability and precise engine positioning.
  • Reduces vibration and harshness, improving cabin comfort.
  • Enhances throttle response by limiting engine movement.
  • Protects critical components from stress and misalignment.
  • Available in rubber or performance polyurethane for tailored ride feel.
  • Perfect fitment across Porsche models — air-cooled, turbocharged, or hybrid.

Whether you’re maintaining daily drivability or preparing for track use, replacement mounts deliver the durability and control your Porsche deserves.

Highlights:

  • Precision-engineered replacement engine mounts for all Porsche models.
  • High-grade rubber, polyurethane, or reinforced construction.
  • Improves handling, comfort, and vibration isolation.
  • Direct-fit compatibility for easy installation and perfect alignment.
  • Ideal for rebuilds, performance upgrades, or preventive maintenance.
  • Restores driving dynamics and comfort in classic and modern Porsches.

How to Identify and Replace Worn Engine Top Mounts

In this informative session, Lawrence Todd from Design 911 explains all the essential details about engine mounts—what they do, how to recognise signs of deterioration, and when it's time for a replacement. Discover the various types of engine mounts available for Porsche models and how upgrading can improve your vehicle’s performance.
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