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Exhaust gasket rear silencer. Porsche 911 1965-73 / 914/6 - 90111119300
90111119300/1
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
Information
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90111119300
The product you are viewing cross references to these numbers
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90111119300
90111119300
The product you are viewing cross references to these numbers
Price: €5.84
In stock
Related products
Vehicle Group
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche 991.2 Speedster 4.0L (510Bhp) 2019
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
- Porsche 992.1 GT3 RS 4.0L 2022-24
- Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
Information
Exhaust manifold to head gasket. Each
Fits:
Porsche 991.1 GT3 / RS
Porsche 991.2 GT3 / RS / R / Speedster
Porsche 992 GT3 / RS
Porsche 718 GT4 RS Cayman
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9GT251261
The product you are viewing cross references to these numbers
Fits:
Porsche 991.1 GT3 / RS
Porsche 991.2 GT3 / RS / R / Speedster
Porsche 992 GT3 / RS
Porsche 718 GT4 RS Cayman
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9GT251261
9A111110790
9GT251261
The product you are viewing cross references to these numbers
Price: €81.42
Orderable
Vehicle Group
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche 991.2 Speedster 4.0L (510Bhp) 2019
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
- Porsche 992.1 GT3 RS 4.0L 2022-24
- Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
Information
Exhaust manifold to head gasket
This OE Match exhaust manifold to cylinder head gasket is a replacement exhaust sealing gasket for Porsche GT4 RS, 991 GT3 / GT3 RS, and 992 GT3 / GT3 RS models. It is designed to match the original-style fitment and function, helping provide a secure seal between the exhaust manifold and cylinder head.
Sold individually, 2 required per vehicle
Fits:
Porsche 991.1 GT3 / RS
Porsche 991.2 GT3 / RS / R / Speedster
Porsche 992 GT3 / RS
Porsche 718 GT4 RS Cayman
Diagram ref no 3
The exhaust manifold gasket seals the joint between the cylinder head exhaust ports and the exhaust manifold. It helps prevent exhaust gas leaks, maintains correct exhaust flow, and supports proper engine performance, emissions control, and exhaust system operation.
Functions
• Seals the exhaust manifold to cylinder head joint
• Helps prevent exhaust gas leaks
• Supports correct exhaust flow from the engine
• Helps maintain engine performance and response
• Reduces the risk of ticking noises caused by manifold leaks
• Replaces compressed, leaking, damaged, or worn original gaskets
• OE Match replacement for exhaust system service and repair.
Why Replace This Part?
Exhaust manifold gaskets are exposed to extreme heat, pressure, vibration, and repeated heat cycling. Over time, the gasket can compress, burn through, crack, or lose sealing ability. A failed gasket may cause exhaust ticking, fumes, loss of performance, incorrect emissions readings, or heat damage around the manifold area. Replacing the gasket helps restore a reliable exhaust seal and correct system operation.
When to Replace This Part
• The exhaust manifold has been removed
• Exhaust gas leakage is present at the cylinder head joint
• A ticking or blowing noise is heard from the manifold area
• The gasket is crushed, burnt, cracked, or damaged
• Exhaust fumes or soot marks are visible around the manifold flange
• The exhaust system or headers are being serviced or replaced
• The engine is undergoing repair, rebuild, or preventative maintenance.
Where it fits on the car
This gasket fits between the exhaust manifold and the cylinder head. It is used at the exhaust port sealing face and should be installed according to the factory exhaust manifold layout and tightening procedure.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9GT251261
The product you are viewing cross references to these numbers
This OE Match exhaust manifold to cylinder head gasket is a replacement exhaust sealing gasket for Porsche GT4 RS, 991 GT3 / GT3 RS, and 992 GT3 / GT3 RS models. It is designed to match the original-style fitment and function, helping provide a secure seal between the exhaust manifold and cylinder head.
Sold individually, 2 required per vehicle
Fits:
Porsche 991.1 GT3 / RS
Porsche 991.2 GT3 / RS / R / Speedster
Porsche 992 GT3 / RS
Porsche 718 GT4 RS Cayman
Diagram ref no 3
The exhaust manifold gasket seals the joint between the cylinder head exhaust ports and the exhaust manifold. It helps prevent exhaust gas leaks, maintains correct exhaust flow, and supports proper engine performance, emissions control, and exhaust system operation.
Functions
• Seals the exhaust manifold to cylinder head joint
• Helps prevent exhaust gas leaks
• Supports correct exhaust flow from the engine
• Helps maintain engine performance and response
• Reduces the risk of ticking noises caused by manifold leaks
• Replaces compressed, leaking, damaged, or worn original gaskets
• OE Match replacement for exhaust system service and repair.
Why Replace This Part?
Exhaust manifold gaskets are exposed to extreme heat, pressure, vibration, and repeated heat cycling. Over time, the gasket can compress, burn through, crack, or lose sealing ability. A failed gasket may cause exhaust ticking, fumes, loss of performance, incorrect emissions readings, or heat damage around the manifold area. Replacing the gasket helps restore a reliable exhaust seal and correct system operation.
When to Replace This Part
• The exhaust manifold has been removed
• Exhaust gas leakage is present at the cylinder head joint
• A ticking or blowing noise is heard from the manifold area
• The gasket is crushed, burnt, cracked, or damaged
• Exhaust fumes or soot marks are visible around the manifold flange
• The exhaust system or headers are being serviced or replaced
• The engine is undergoing repair, rebuild, or preventative maintenance.
Where it fits on the car
This gasket fits between the exhaust manifold and the cylinder head. It is used at the exhaust port sealing face and should be installed according to the factory exhaust manifold layout and tightening procedure.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9GT251261
9A111110790
9GT251261
The product you are viewing cross references to these numbers
Price: €56.05
In stock