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Exhaust Gaskets

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DISPLAYING 1 to 7 (of 7 products)
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90111119300
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Exhaust gasket rear silencer. Sold each.

porsche

Fits:
Porsche 911 1965-73 (need 2pcs)
Porsche 914/6 (need 2pcs)

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Diagram ref no 8

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90111119300
90111119300
1621100700

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90111119300/1
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Exhaust gasket rear silencer.
This gasket is used to seal the joint between the rear silencer (muffler) and the heat exchanger flange on classic Porsche 911 and 914/6 models, ensuring a tight, leak-free connection in the exhaust system.  
Sold each, Typically two gaskets are required when reinstalling the exhaust rear silencer.

Fits:
Porsche 911 1965 - 1973 (need 2 pcs)
Porsche 914/6 1970 - 1972 (need 2pcs)

Diagram ref no 8

 Application: Seals the connection between the rear silencer (muffler) and the adjacent exhaust pipe/heat exchanger flange on classic air-cooled Porsche engines.

Installed at the rear silencer interface of the exhaust system, this gasket ensures:
A secure, leak-resistant seal between exhaust components
 Smooth exhaust gas passage without loss of power or noise
 Reduced risk of harmful fumes entering cabin areas.

It is made to withstand the high heat and vibration levels typical of classic Porsche exhaust systems, and matches the original Porsche design for long-lasting performance.

Over time, the original exhaust gaskets can crack, harden, or deteriorate due to heat cycles, vibration, and corrosion. A worn or ineffective gasket can lead to:
 Exhaust leaks at the silencer joint
 Increased exhaust noise
 Reduced engine efficiency and performance
 Fumes entering the undercarriage or cabin

Replacing exhaust gasket restores proper sealing, preserves exhaust flow integrity, reduces noise, and helps maintain emissions compliance on classic Porsche vehicles.

Replace the exhaust rear silencer gasket if you notice:
 Audible exhaust leaks near the silencer connection
 Increased cabin noise or exhaust rasp
 Visible gasket deterioration or rust
 During exhaust system removal or reinstallation

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90111119300
90111119300

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Special Order item
91111319001
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Exhaust gasket. Heat exchanger to engine head. 2.5 x 52 x 34.

porsche

Fits:
Porsche 911 1965-73
Porsche 911 1974-77 *cars with SSI exhaust systems
Porsche 911 (930) Turbo 1975-89 3.0L / 3.3L

Porsche 914/6 1970-76 6-cylinder cars

Porsche 924 Turbo / GT 1976-85

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Diagram ref no 14

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91111319001
91111319001
93011119109
93011119101
91111319000

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91111319001/1
Product Information
Product Information
Exhaust gasket. Heat exchanger to engine head. 2.5 x 52 x 34.

oematch

Fits:
Porsche 911 1965-73
Porsche 911 1974-77 *cars with SSI exhaust systems
Porsche 911 (930) Turbo 1975-89 3.0L / 3.3L

Porsche 914/6 1970-76 6-cylinder cars

Porsche 924 Turbo / GT 1976-85

Click 'Zoom in' for large parts diagram.
Diagram ref no 14

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91111319001
91111319001
93011119109
93011119101
90111119500
045.332
91111319000

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02125632
Product Information
Product Information
Gasket for heat exchanger cover. 

oematch

Fits:
Porsche 912E - 1976
Porsche 914-4 1.8ltr / 2.0ltr - 1970 to 1976

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Diagram ref no 19



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02125632
021256325A
021256326A

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039256251
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Seal ring for heat exchanger.

porsche

Fits:
Porsche 914-1,8/1,8V
Porsche 914-2,0

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Diagram ref no 16

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039256251
039256251
225.290

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039256251/1
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Product Information
Seal ring for heat exchanger.

elring

Fits:
Porsche 914-1,8/1,8V
Porsche 914-2,0

Click 'Zoom in' for large parts diagram.
Diagram ref no 16

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039256251
039256251
225.290

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DISPLAYING 1 to 7 (of 7 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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