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Exhaust Gaskets

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DISPLAYING 17 to 24 (of 24 products)
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99611110755
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Product Information
Exhaust manifold gasket. Sold each.

porsche

Fits:
Porsche 986 Boxster 1997-04
Porsche 987 MKI Boxster 2005-08
Porsche 987C MKI Cayman 2005-08
Porsche 996 3.4L C2 / C4 1998-01
Porsche 996 3.6L C2 / C4 / C4S 2002-05
Porsche 997 MKI Carrera 2005-08 (M96.05 / M97.01)

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

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99611110755
99611110755
230.333

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Special Offer
99611110755/1
Product Information
Product Information
Exhaust manifold gasket.
Sold each. 


This exhaust manifold gasket is a precision replacement part built to Porsche’s original specifications. Designed to seal the connection between the exhaust manifold (or heat exchanger) and the cylinder head, it replicates the exact dimensions, materials, and performance of the factory gasket for a perfect fit.

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1 Cayman 2005 - 2008
Porsche 996 3.4L C2 / C4 1998 - 2001
Porsche 996 3.6L C2 / C4 / C4S 2002 - 2005
Porsche 997.1 Carrera 2005 - 2008 (M96.05 / M97.01)

Diagram ref no 3

This gasket ensures a gas-tight seal at one of the hottest points in the exhaust system, preventing leaks and maintaining optimal exhaust pressure. It also helps preserve engine efficiency, reduce noise, and prevent exhaust gases or heat from escaping into the engine bay.

Why replacement matters:
•  Factory gaskets can deteriorate or warp over time due to extreme heat and pressure cycles
•  A worn or damaged gasket may cause exhaust leaks, reduced performance, and loud exhaust noise
  Installing an OE Match replacement restores a secure seal, maintaining proper exhaust flow, back pressure, and long-term reliability. 

Fits between the exhaust manifold or heat exchanger and the cylinder head.
Sold individually; two or more may be required depending on the engine configuration.



Related reference numbers
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99611110755
416-006
99611110755
230.333

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99611110755/2
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Product Information
Exhaust manifold gasket. 'Crushable' design. Ideal for aftermarket exhaust with flat flanges. price is each

oematch

Fits:
Porsche 986 Boxster 1997-04
Porsche 987 MKI Boxster 2005-08
Porsche 987C MKI Cayman 2005-08
Porsche 996 3.4L C2 / C4 1998-01
Porsche 996 3.6L C2 / C4 / C4S 2002-05
Porsche 997 MKI Carrera 2005-08 (M96.05 / M97.01)

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

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99611110755
99611110755

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Special Order item
99611111350
Product Information
Product Information
Exhaust manifold to cat gasket.

porsche

Fits:
Porsche 996 C2 / C4 all

Click picture for large parts diagram.
Diagram ref no 7

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

99611111350
99611111350
185.370

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Special Offer
99611111350/1
Product Information
Product Information
Exhaust manifold to cat gasket.

elring

Fits:
Porsche 996 C2 / C4 all

Click picture for large parts diagram.
Diagram ref no 7

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99611111350
99611111350
185.370

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99908405202/1::3
Product Information
Product Information
Exhaust Manifold to Catalytic Converter Nut.
M8. EACH

oematch

Fits:
Porsche 986 Boxster 1997-05
Porsche 987C Cayman 2005-08
Porsche 996 C2 / C4 / C4S 1997-05
Porsche 996 GT3 1999-05

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99908405202
99908405202
90091000303

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99908405202T::2
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Exhaust Manifold to Catalytic Converter M8 Nut. Made out of Titanium.

rohler

Fits:
Porsche 986 Boxster 1997-05
Porsche 987C Cayman 2005-08
Porsche 996 C2 / C4 / C4S 1997-05
Porsche 996 GT3 1999-05

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99908405202T
99908405202

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MMP01
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Metal Polish for Exhaust & Tail pipes
100ml

milltek

After years of being asked to come up with a solution from our dealers, race-teams and end-users, we have now solved a perennial problem for many conscientious owners; namely, how to refresh their stainless exhaust system to an 'as-new' condition when detailing the car. After several months of testing in all markets and weather conditions, we will soon be releasing a tailored metal polish that will render any stainless steel exhaust system or metal component ready for concours or show duty, with the minimum of effort. Perfect not only for keeping your Milltek system in tip-top condition, but also any other polished or chromed parts on your car (or bike!) too.

The polish has been developed by our R&D engineers in association with leading car care experts, Dodo Juice. The result is a high shine, mild-abrasive polish that can be used on all types of metal, including chrome. Sophisticated diminishing abrasives remove contaminants initially, then refine for a mirror finish while the chemical cleaning action helps dissolve fuel, oil and soot deposits. The final finishing touch is down to the use of an active sealing ingredient helps metal resist future tarnishing. The polish has been formulated to work well with any medium resistance, short-pile cloth and is an absolute doddle to apply or remove, making the art of restoring any metal surface the work of mere minutes.

100ml bottle with a FREE microfibre cloth, which should be more than enough for 20 intensive back boxes and tail trim cleans.
DISPLAYING 17 to 24 (of 24 products)
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About Exhaust Gaskets

Exhaust Gaskets for Porsche | Precision Seal & Performance Reliability

Exhaust gaskets are crucial components in your Porsche’s exhaust system, ensuring a tight, leak-free seal between joints and flanges. They prevent exhaust gases from escaping, maintain correct back pressure, and protect nearby components from heat and harmful emissions.

At Design911, we supply a full range of exhaust gaskets designed for Porsche vehicles — from classic air-cooled 911s to high-performance modern models. Manufactured from high-temperature, corrosion-resistant materials, these gaskets deliver durability and a perfect seal under extreme conditions.

Whether you’re installing a new exhaust, replacing worn components, or upgrading for performance gains, our high-quality Porsche exhaust gaskets guarantee a reliable fit and long-lasting performance.

What Do Exhaust Gaskets Do?

Exhaust gaskets form airtight seals between the various components of the exhaust system, such as manifolds, headers, pipes, and catalytic converters. They play a vital role in maintaining system integrity, performance, and emissions control.

Core Functions:

  • Seals exhaust joints to prevent leaks and gas escape.
  • Maintains back pressure for efficient engine performance.
  • Reduces exhaust noise and vibration.
  • Protects against heat and gas damage.
  • Ensures compliance with emissions standards.

A properly fitted gasket ensures that exhaust gases are channelled efficiently through the system — essential for power, fuel economy, and emissions control.

Why Do Exhaust Gaskets Fail?

Over time, exhaust gaskets are subjected to extreme heat, pressure, and vibration, which can lead to wear or failure.

Common Causes of Failure Include:

  • Thermal expansion and contraction causing cracks or deformation.
  • Corrosion from moisture or road salt exposure.
  • Improper installation or over-tightening.
  • Aging and fatigue of gasket material.
  • Exhaust vibration leading to joint loosening.

When a gasket fails, you may notice hissing or tapping noises, a burning smell, or loss of engine performance. Exhaust leaks can also increase harmful emissions and damage surrounding components.

Why Replace Your Exhaust Gaskets?

Replacing worn or leaking exhaust gaskets is essential for maintaining your Porsche’s performance, efficiency, and emissions compliance.

Key Benefits:

  • Restores proper exhaust sealing and flow efficiency.
  • Reduces exhaust noise and prevents gas leaks.
  • Improves performance and throttle response.
  • Prevents damage to manifolds, sensors, and nearby parts.
  • Crafted from high-grade composite or metal-reinforced materials.
  • Exact-fit design for Porsche 911, Cayman, Boxster, Panamera, Macan and more.

Whether you’re rebuilding your exhaust system or performing routine maintenance, new gaskets ensure reliable sealing and long-term durability.

Highlights:

  • Precision-engineered exhaust gaskets for all Porsche models.
  • High-temperature, corrosion-resistant materials for durability.
  • Ensures a tight, leak-free exhaust seal.
  • Improves performance and emissions control.
  • Perfect fit for performance and restoration projects.
  • Essential for smooth, quiet, and efficient exhaust operation.

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