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Exhaust Fitting Kits

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DISPLAYING 1 to 16 (of 19 products)
1 2
EXHFITTING.996.1.3
Product Information
Product Information
COMPLETE Exhaust Fitting Kit.
Contains all necessary gaskets, clamps, sleeves, nuts, bolts and washers. Ideal when you change the whole exhaust system on your Porsche 996 - manifolds, catalytic converters and silencers at the same time.

Fits:

Porsche 996 C2 3.4L 1997-08/01
Porsche 996 C4 3.4L 1997-08/01
Porsche 996 C2 3.6L 09/01-2005
Porsche 996 C4 3.6L 09/01-2005
Porsche 996 C4S 3.6L 09/01-2005


*Click on the image to see a large parts diagram.

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Related, superseded, cross reference or alternative numbers for comparison.

EXHFITTING.996.1.3
9990750710A
99611110755
99611111350
99908405202
90007428702
99951108700
90037803301
90037802209
90003110501
90037818809
90037818709
99711152000

The product you are viewing cross references to these numbers
EXHFITTING.996.1.3T
Product Information
Product Information
COMPLETE Exhaust Fitting Kit with Titanium clamps
Contains all necessary gaskets,  Titanium clamps, sleeves, nuts, bolts and washers. Ideal when you change the whole exhaust system on your Porsche 996 - manifolds, catalytic converters and silencers at the same time.

Fits:

Porsche 996 C2 3.4L 1997-08/01
Porsche 996 C4 3.4L 1997-08/01
Porsche 996 C2 3.6L 09/01-2005
Porsche 996 C4 3.6L 09/01-2005
Porsche 996 C4S 3.6L 09/01-2005

*Click on the image to see a large parts diagram.

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Related, superseded, cross reference or alternative numbers for comparison.

EXHFITTING.996.1.3T
9990750710A
99611110755
99611111350
99908405202
90007428702
99951108700
90037803301
90037802209
90003110501
90037818809
90037818709
99711152000

The product you are viewing cross references to these numbers
EXHFITTING.996.1.1
Product Information
Product Information
Exhaust Catalyst fitting kit. steel camps & component with stainless steel cat bolts and nuts.

oematch


Fits:
Porsche 996 Carrera 3.4L
Porsche 996 Carrera 3.6L

Kit includes:
2 x Exhaust sleeve catalytic converter to silencer. Porsche 996 / 997 (99711152000/1 
2 x Exhaust manifold to cat gasket. Porsche 996 C2 / C4 (99611111350/1 
2 x Oil pressure relief screw plug. Porsche 911 / 964 / 993 / 996T / 997T (99906402601/1 
2 x Sealing ring N0138322 (N0138322 
6 x Exhaust manifold to catalytic converter bolt. Porsche 986 Boxster / 996 - Stainless steel (90007428702/1 
6 x Exhaust Lock Nut for Bolt. Porsche 964 (99908405202/1 2 x Hexagon-head bolt (90008308000 
2 x Sealing Ring (90012305020 



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

EXHFITTING.996.1.1
99711152000
99611110800
99611122002
99951108700

The product you are viewing cross references to these numbers
EXHFITTING.996.1.1T
Product Information
Product Information
Exhaust Catalysts Fitting Kit with Titanium clamps


Fits:
Porsche 996 Carrera 3.4L
Porsche 996 Carrera 3.6L

Kit Includes:
2 x Exhaust sleeve Titanium catalytic converter to silencer. Porsche 996 / 997 (99711152000
2 x Exhaust manifold to cat gasket. Porsche 996 C2 / C4 (99611111350
2 x Oil pressure relief screw plug. Porsche 911 / 964 / 993 / 996T / 997T (99906402601
2 x Sealing ring N0138322 (N0138322 
6 x Exhaust manifold to catalytic converter bolt. Porsche 986 Boxster / 996 - Stainless steel (90007428702
6 x Exhaust Lock Nut for Bolt. Porsche 964 (99908405202
2 x Hexagon-head bolt (90008308000 
2 x Sealing Ring (90012305020



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

EXHFITTING.996.1.1T
99611110800
99611122002
99951108700

The product you are viewing cross references to these numbers
EXHFITTING.996.1.2
Product Information
Product Information
Rear Silencer Exhaust Fitting Kit.*
Contains all necessary clamps, sleeves, nuts, bolts and washers. Ideal when you change the rear exhaust silencers on your Porsche 996

*Brackets and holders not included but available separately

Fits:
Porsche 996 Carrera 3.4L
Porsche 996 Carrera 3.6L

*Click on the image to see a large parts diagram.

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

EXHFITTING.996.1.2
99611110800
99611122002
99951108700

The product you are viewing cross references to these numbers
EXHFITTING.996.1.7T
Product Information
Product Information
Exhaust Fitting Kit with Titanium clamps . Porsche (911) 996 C2 /C4 / C4S

Fits:
Porsche 996 C2 3.4L 1997-08/01 
Porsche 996 C4 3.4L 1997-08/01 
Porsche 996 C2 3.6L 09/01-2005 
Porsche 996 C4 3.6L 09/01-2005 
Porsche 996 C4S 3.6L 09/01-2005


Kit Includes:
2 x Header Gaskets (Diagram Ref 3)
2 x Header to Cat Gaskets (Diagram Ref 7)
2 x Cats to Muffler Clamps (Diagram Ref 29)
2 x Muffler to Tail Pipe Clamps (Diagram Ref 22)

*Click on the image to see a large parts diagram.



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

EXHFITTING.996.1.7T
99611110755
99611111350
99711152000
99611110800

The product you are viewing cross references to these numbers
EXHFITTING.996.1.2T
Product Information
Product Information
Rear Silencer Exhaust Fitting Kit with Titanium Clamps
Contains all necessary  Titanium Clamps , sleeves, nuts, bolts and washers. Ideal when you change the rear exhaust silencers on your Porsche 996

Fits:
Porsche 996 Carrera 3.4L
Porsche 996 Carrera 3.6L

*Click on the image to see a large parts diagram.

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

EXHFITTING.996.1.2T
99611110800
99611122002
99951108700

The product you are viewing cross references to these numbers
EXHFITTING.996.1.7
Product Information
Product Information
Exhaust Fitting Kit. Porsche (911) 996 C2 /C4 / C4S

Fits:
Porsche 996 C2 3.4L 1997-08/01 
Porsche 996 C4 3.4L 1997-08/01 
Porsche 996 C2 3.6L 09/01-2005 
Porsche 996 C4 3.6L 09/01-2005 
Porsche 996 C4S 3.6L 09/01-2005


Kit Includes:
2 x Header Gaskets (Diagram Ref 3)
2 x Header to Cat Gaskets (Diagram Ref 7)
2 x Cats to Muffler Clamps (Diagram Ref 29)
2 x Muffler to Tail Pipe Clamps (Diagram Ref 22)

*Click on the image to see a large parts diagram.



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

EXHFITTING.996.1.7
99611110755
99611111350
99711152000
99611110800

The product you are viewing cross references to these numbers
EXHFITTING.996.2.1
Product Information
Product Information
Manifold fitting kit.

Contains all necessary gaskets, nuts & bolts.

Fits:
Porsche 996 Carrera 3.6L
EXHAUSTMKIT
Product Information
Product Information

Exhaust silencer brackets mounting kit. (12 Parts ) Porsche 996 / 997 / 997.2, 

This 12pcs exhaust bracket mounting kit contains the essential parts when replacing the rear exhaust boxes, the parts will help when mounting the large mounting brackets. , please note we would also recommend that you replace the 8 x Exhaust vibration dampener for silencer bracket.  Ref  997.111.229.30

This kit includes the following parts: 

  • 2 x Silencer bracket sleeve for long bolt.  Ref  996.111.230.00
  • 2 x Silencer Bracket Sleeve for Short Bolt.  Ref 996.111.231.00
  • 2 x Exhaust hexagon head bolt (SHORT).   Ref 900.378.105.01
  • 2 x Exhaust hexagon head bolt (LONG).   Ref 900.378.183.01
  • 4 x Exhaust hexagon nut.  Ref 900.380.005.01


Fits:

  • Porsche 996 C2 3.4L 1997-08/01
  • Porsche 996 C4 3.4L 1997-08/01
  • Porsche 996 C2 3.6L 09/01-2005
  • Porsche 996 C4 3.6L 09/01-2005
  • Porsche 996 C4S 3.6L 09/01-2005
  • Porsche 997 MK1 Carrera 2 3.6L 2005-08
  • Porsche 997 MK1 Carrera 2S 3.8L 2005-08
  • Porsche 997 MK1 Carrera 4 3.6L 2005-08
  • Porsche 997 MK1 Carrera 4S 3.8L 2005-08  

contains items 16, 24, 25, 35, 36 



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

EXHAUSTMKIT
99611123000
90037810501
90037818301
99611123100
90038000501

The product you are viewing cross references to these numbers
EXHAUSTMKIT1
Product Information
Product Information

Exhaust silencer brackets mounting kit. (20 Parts ) Porsche 996 / 997 / 997.2, 

This 20pcs exhaust bracket mounting kit contains the essential parts when replacing the rear exhaust boxes, the parts will help when mounting the large mounting brackets. 

This kit includes the following parts: 

  • 8 x Exhaust vibration dampener for silencer bracket.  Ref  997.111.229.30
  • 2 x Silencer bracket sleeve for long bolt.  Ref  996.111.230.00
  • 2 x Silencer Bracket Sleeve for Short Bolt.  Ref 996.111.231.00
  • 2 x Exhaust hexagon head bolt (SHORT).   Ref 900.378.105.01
  • 2 x Exhaust hexagon head bolt (LONG).   Ref 900.378.183.01
  • 4 x Exhaust hexagon nut.  Ref 900.380.005.01

Fits:

  • Porsche 996 C2 3.4L 1997-08/01
  • Porsche 996 C4 3.4L 1997-08/01
  • Porsche 996 C2 3.6L 09/01-2005
  • Porsche 996 C4 3.6L 09/01-2005
  • Porsche 996 C4S 3.6L 09/01-2005
  • Porsche 997 MK1 Carrera 2 3.6L 2005-08
  • Porsche 997 MK1 Carrera 2S 3.8L 2005-08
  • Porsche 997 MK1 Carrera 4 3.6L 2005-08
  • Porsche 997 MK1 Carrera 4S 3.8L 2005-08  

contains items 16, 24, 25, 34, 35, 36 



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

EXHAUSTMKIT1
99711122930
99611123000
90037810501
90037818301
99611123100
90038000501

The product you are viewing cross references to these numbers
99711122930/1KIT
Product Information
Product Information

Exhaust support bracket sound absorber. (SET OF 4) Porsche 996 / 997  99711122930

4 pcs required per exhaust box bracket (8pcs or 2 sets required per car) 

oematch

Fits:

  • Porsche 996 C2 / C4 
  • Porsche 997 C2 / C4 




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

99711122930
99711122930
99611122702
99611122802
99611122703
99611122803

The product you are viewing cross references to these numbers
EXHFITTING.996.1.5
Product Information
Product Information
Mounting kit for catalytic converter pipes with clamps, gaskets, nuts & bolts.

oematch

Fits:
Porsche 996 Carrera 3.4L-3.6L 1998-05
Porsche 996 GT3 3.6 2004-05
Porsche 996 GT3 3.6 1999-01

Also Fits Catalytic Converter Bypass / Sports kits
99611196260S, 996PO96260S and 996PO96270S.

Click 'Zoom in' for large parts diagram.
Diagram ref no 7, 8, 13, 29 and 37



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

EXHFITTING.996.1.5
99611122001
99611122002
99711152000
99951108700
99611111350
99908405202
90007428702

The product you are viewing cross references to these numbers
EXHFITTING.996.1.6
Product Information
Product Information
Mounting Kit for Rear Exhaust.

oematch

Fits:
Porsche 996 Carrera 3.4L-3.6L 1998-05
Porsche 996 GT3 3.6 2004-05
Porsche 996 GT3 3.4 1999-01

Kit included:
2x 99611122002 Pipe Connector, 55.5x75mm
2x 99611110800 Clamp, Ø70mm
2x 90037818301 Bolt, M8x1.25x140mm
2x 90037810501 Bolt, M8x1.25x70mm
12x 90038000501 Lock nut, M8x1.25mm

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

EXHFITTING.996.1.6
90037818301
90037810501
90038000501
99611122002
99611110800

The product you are viewing cross references to these numbers
EXHFITTING.996.1.5T
Product Information
Product Information
Mounting Kit with Titanium clamps for Catalytic Converter. Porsche 996

Fits:
Porsche 996 Carrera 3.4L-3.6L 1998-05
Porsche 996 GT3 3.6 2004-05
Porsche 996 GT3 3.6 1999-01

Also Fits Catalytic Converter Bypass / Sports kits
99611196260S, 996PO96260S and 996PO96270S.

Click 'Zoom in' for large parts diagram.
Diagram ref no 7, 8, 13, 29 and 37



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

EXHFITTING.996.1.5T
99611122001
99611122002
99711152000
99951108700
99611111350
99908405202
90007428702

The product you are viewing cross references to these numbers
EXHFITTING.996.1.6T
Product Information
Product Information
Mounting Kit with Titanium clamps for Rear Exhaust Porsche 996 Carrera / GT3

Fits:
Porsche 996 Carrera 3.4L-3.6L 1998-05
Porsche 996 GT3 3.6 2004-05
Porsche 996 GT3 3.4 1999-01

Kit included:
2x 99611122002 Pipe Connector, 55.5x75mm
2x 99611110800 Clamp, Ø70mm
2x 90037818301 Bolt, M8x1.25x140mm
2x 90037810501 Bolt, M8x1.25x70mm
12x 90038000501 Lock nut, M8x1.25mm

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

EXHFITTING.996.1.6T
90037818301
90037810501
90038000501
99611122002
99611110800

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 19 products)
1 2
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About Exhaust Fitting Kits

Exhaust Fitting Kits for Porsche | Complete Installation & Repair Solutions

The exhaust fitting kit is an essential component of any exhaust installation, replacement, or upgrade. It ensures that all joints, clamps, seals, and brackets in your Porsche’s exhaust system are correctly aligned and securely fastened, preventing leaks and maintaining proper exhaust flow.

At Design911, we supply a wide range of exhaust fitting kits designed to match Porsche exhaust systems with manufacturer-level accuracy. Each kit includes high-quality gaskets, clamps, bolts, nuts, seals, and mounting hardware, ensuring a professional, leak-free fit — whether you’re restoring a classic 911 or maintaining a modern performance model.

Our fitting kits are manufactured to exact tolerances from corrosion-resistant materials, guaranteeing a long-lasting seal and reliable performance under high-temperature, high-pressure conditions.

What Do Exhaust Fitting Kits Do?

An exhaust fitting kit provides the components required to properly install, secure, or replace sections of your Porsche’s exhaust system. These parts ensure stability, prevent vibration, and maintain airtight joints for optimum exhaust efficiency.

Core Functions:

  • Seals exhaust joints to prevent gas leaks and noise.
  • Secures exhaust components such as pipes, silencers, and catalytic converters.
  • Reduces vibration and movement caused by engine motion.
  • Ensures proper exhaust alignment for optimal flow and pressure balance.
  • Maintains performance and compliance with emissions standards.

Using a dedicated Porsche exhaust fitting kit ensures your system functions exactly as intended — improving both performance and reliability.

Why Do Exhaust Fitting Components Fail?

Due to constant exposure to heat, vibration, and corrosive exhaust gases, fitting components are prone to wear over time.

Common Causes of Failure Include:

  • Rust and corrosion from road salt or moisture.
  • Thermal fatigue from repeated heating and cooling cycles.
  • Loose fittings causing leaks or rattles.
  • Worn seals or gaskets leading to reduced exhaust pressure.
  • Cracked or weakened clamps and bolts from prolonged vibration.

A failing fitting kit can lead to loud exhaust noise, loss of performance, emission leaks, or even component misalignment. Replacing these parts is essential for safety, efficiency, and sound quality.

Why Replace or Upgrade Your Exhaust Fitting Kit?

Replacing old or damaged fitting components with precision-engineered replacements ensures your Porsche’s exhaust system performs at its best.

Key Benefits:

  • Restores proper exhaust sealing and flow.
  • Reduces exhaust leaks and unwanted noise.
  • Improves durability and vibration resistance.
  • Crafted from high-grade stainless steel and heat-resistant materials.
  • Compatible with standard and performance exhaust systems.
  • Direct-fit design for Porsche 911, Cayman, Boxster, Panamera, Macan and more.

Whether installing a new exhaust system or carrying out maintenance, using a complete fitting kit guarantees a professional finish and long-lasting results.

Highlights:

  • Complete exhaust fitting kits for Porsche models.
  • Includes clamps, bolts, gaskets, and seals for perfect alignment.
  • Designed for precision fitment and long-term reliability.
  • Prevents leaks and optimises exhaust pressure balance.
  • Ideal for exhaust upgrades, repairs, and restorations.
  • Manufactured from corrosion- and heat-resistant materials.

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