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Exhaust Gaskets

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DISPLAYING 17 to 23 (of 23 products)
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99611311300/1
Product Information
Product Information
Exhaust manifold to cat gasket.

oematch

Fits:
Porsche Boxster 986 2.7L / 3.2L

Click 'Zoom in' for large parts diagram.
Diagram ref no 7

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99611311300
99611311300
531.340

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Special Order item
99611111302
Product Information
Product Information
Exhaust manifold to cat gasket. Sold each.
porsche

Fits:
Porsche 986 Boxster 2.5L 1997-99

Click picture for large parts diagram.
Diagram ref no 20

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Related, superseded, cross reference or alternative numbers for comparison.

99611111302
99611111302
183.300

The product you are viewing cross references to these numbers
99611111302/1
Product Information
Product Information
Exhaust manifold to cat gasket. Sold each.

elring

Fits:
Porsche 986 Boxster 2.5L 1997-99

Click picture for large parts diagram.
Diagram ref no 20

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Related, superseded, cross reference or alternative numbers for comparison.

99611111302
99611111302
183.300

The product you are viewing cross references to these numbers
99711111300/1
Product Information
Product Information
Exhaust manifold to cat gasket.
Sold each. Required 2 per car.

This exhaust gasket is built to factory dimensions, it seals perfectly between the exhaust manifold and catalytic converter, preventing leaks and preserving smooth exhaust flow and performance.

Fits:
Porsche 997 C2 / C4 all 2005 - 2008
Porsche Cayman 987C MKI & MKII 2005 - 2012
Porsche Boxster 987 MKI & MKII 2005 - 2012
Porsche 982 Boxster GTS 4.0 2017>>
Porsche 982C Cayman GTS 4.0 2017>>
Porsche 982 Spyder 4.0 2019>>
Porsche 982C GT4 4.0 2019>>

Diagram ref no 7

Located between the manifold / heat exchanger and the catalytic converter / exhaust pipe connection on Porsche models using the M96 / M97 / M98 engines.

Original gaskets may deteriorate over time due to heat, corrosion, and mechanical stress, allowing exhaust gases to escape. Leaks at this junction can cause noise, performance loss, and potential exposure of heat to nearby parts. An OE-Match version restores correct sealing, prevents leaks, and helps preserve the intended exhaust behaviour.



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

99711111300
99711111300

The product you are viewing cross references to these numbers
Special Order item
99711111300
Product Information
Product Information
Exhaust manifold to cat gasket. Sold each.
porsche

Fits:
Porsche 997 C2 / C4 all 2005-08
Porsche Cayman 987C MKI & MKII 2005>>
Porsche Boxster 987 MKI & MKII 2005>>
Porsche 982 Boxster GTS 4.0 2017>>
Porsche 982C Cayman GTS 4.0 2017>>
Porsche 982 Spyder 4.0 2019>>
Porsche 982C GT4 4.0 2019>>

Click 'Zoom in' for large parts diagram.
Diagram ref no 7

Related reference numbers
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99711111300
99711111300

The product you are viewing cross references to these numbers
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

Related reference numbers
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99908405202
99908405202
90091000303

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99908405202T::2
Product Information
Product Information
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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DISPLAYING 17 to 23 (of 23 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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