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Exhaust muffler clamp. Porsche 997 GT3 / 991 GT3 / Carrera GT - 99711133690
99711133690/1
Vehicle Group
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MKII GT3 2010-11
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500Bhp) 2015-16
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
Information
Front muffler clamp (OE part reference 997.111.336.90) — used to secure the front/centre muffler sections on 911 GT3 / GT3 RS and compatible Porsche 997 / 991 fitments. Built to the factory dimensions for a leak-free connection and correct exhaust alignment.
Price is Each
Fits:
Porsche Carrera GT 2004 - 2006
Porsche 997 GT3 2007 - 2009
Porsche 997 GT3 / GT3 RS / GT3 RS 4.0 2010-11
Porsche 991 GT3 / GT3 RS 2014-18
Porsche 991 R 2016
Diagram ref no 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99711133690
The product you are viewing cross references to these numbers
Price is Each
Fits:
Porsche Carrera GT 2004 - 2006
Porsche 997 GT3 2007 - 2009
Porsche 997 GT3 / GT3 RS / GT3 RS 4.0 2010-11
Porsche 991 GT3 / GT3 RS 2014-18
Porsche 991 R 2016
Diagram ref no 5
Why Replace Your Exhaust Clamp
- Restore a perfect, leak-free seal
- Over time, exhaust clamps can deform, corrode, or lose their clamping strength. Replacing the clamp ensures a secure joint between muffler sections, preventing exhaust leaks, restoring proper back pressure, and maintaining optimal engine performance.
- Eliminate rattles and vibration noise
- Worn or loose clamps are a common cause of rattles, buzzing, or vibration noises from the rear underside of 997 and 991 models. Installing a new clamp is often one of the quickest and most cost-effective ways to eliminate these irritating sounds.
- Factory specifications fitment for performance models
Common Issues and Failure Modes
- Corrosion and rust
- Exhaust clamps and fasteners are exposed to heat, moisture, and road salt. Over time, this can lead to corrosion or seizure, reducing clamping force and risking exhaust leaks.
- Clamp fatigue or deformation
- Repeated heat cycles and vibration can cause the clamp sleeve or bolt to distort, leading to a loose connection and exhaust blow-by.
- Incorrect fitment or short sleeves
- Noise from over-tightening
- Applying excessive clamping force can alter vibration characteristics and introduce new noises. Always follow correct installation torque and alignment procedures.
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99711133690
99711133690
The product you are viewing cross references to these numbers
€146.25
Now €131.62
In stock
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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 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Information
Exhaust strap & bolt. Need 2 per car. Price shown is for each.
Fits:
Porsche 911 1965-83
Click 'Zoom in' for large parts diagram.
Diagram ref no 20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90111115704
The product you are viewing cross references to these numbers
Fits:
Porsche 911 1965-83
Click 'Zoom in' for large parts diagram.
Diagram ref no 20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90111115704
90111115704
1621401800
The product you are viewing cross references to these numbers
€69.93
Now €62.94
In stock
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Information
Clamp for mounting exhaust to heat exchanger.
It is manufactured to replicate the original Porsche specification, offering correct diameter, mounting geometry, material durability and secure fastenings.
Sold each, 2 required per vehicle.
Fits:
Porsche 356 A/B/C 1.6L 01/1955 - 12/1965
Porsche 912 1.6L 01/1965 - 02/1970
Position on Vehicle: Connects the muffler (rear silencer) to the heater/exchanger unit of the exhaust system.
Applications: Ideal when the original clamp is corroded, broken, allowing exhaust leak at the joint, or if restoration demands correct specification hardware.
A sound exhaust system clamp ensures the crucial connection between muffler and heater-exchanger remains sealed and tethered. If this joint fails or the clamp is weakened, you may experience: noisy exhaust leaks, lower back-pressure, potential heater/exchanger corrosion or stress, increased exhaust heat intrusion under the car. Installing a correct clamp restores system integrity and protects the exhaust components.
When and why to replace:
• Visible rust, cracking or breaking of the original clamp.
• Audible exhaust leak or heat-exchange joint sound.
• During full exhaust removal or restoration when the heater/exchanger is exposed.
• When restoring a classic Porsche to correct specification with original-style parts.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
36954109
The product you are viewing cross references to these numbers
It is manufactured to replicate the original Porsche specification, offering correct diameter, mounting geometry, material durability and secure fastenings.
Sold each, 2 required per vehicle.
Fits:
Porsche 356 A/B/C 1.6L 01/1955 - 12/1965
Porsche 912 1.6L 01/1965 - 02/1970
Position on Vehicle: Connects the muffler (rear silencer) to the heater/exchanger unit of the exhaust system.
Applications: Ideal when the original clamp is corroded, broken, allowing exhaust leak at the joint, or if restoration demands correct specification hardware.
A sound exhaust system clamp ensures the crucial connection between muffler and heater-exchanger remains sealed and tethered. If this joint fails or the clamp is weakened, you may experience: noisy exhaust leaks, lower back-pressure, potential heater/exchanger corrosion or stress, increased exhaust heat intrusion under the car. Installing a correct clamp restores system integrity and protects the exhaust components.
When and why to replace:
• Visible rust, cracking or breaking of the original clamp.
• Audible exhaust leak or heat-exchange joint sound.
• During full exhaust removal or restoration when the heater/exchanger is exposed.
• When restoring a classic Porsche to correct specification with original-style parts.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
36954109
36954109
99951101203
The product you are viewing cross references to these numbers
Price: €9.30
Orderable
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 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Information
Exhaust Muffler Strap Bolt. AM 10 x 50.
Fits:
Porsche 911 1965-89
Porsche 911 (930) Turbo 1975-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 21
Related reference numbers
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90006716102
The product you are viewing cross references to these numbers
Fits:
Porsche 911 1965-89
Porsche 911 (930) Turbo 1975-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 21
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90006716102
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€4.57
Now €4.11
In stock