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bracket Genuine Porsche part 99311111484
• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.
Before purchasing thoroughly check part to confirm compatibility.
- We are unable to provide fitting details for this product at this time. Please contact us for further information.
This OE Match exhaust muffler strap is a direct replacement for the original Porsche component used in the 993 exhaust system. It is designed to wrap around and support the rear silencer, securing it firmly to the vehicle’s mounting brackets. It fits either left or right side silencers and is commonly used in pairs, with one strap per muffler. Additional hardware (bolt) may be required: 90006736201
Sold individually
Fits:
Porsche 993 C2 / C4 1994 - 1998
* not turbo models
Diagram Ref No 1
The muffler strap holds the exhaust silencer securely in place, preventing movement or sagging. It helps maintain proper exhaust alignment while reducing vibration and stress on exhaust joints and mounting points.
Function
• Secures the exhaust muffler to the vehicle chassis
• Maintains correct exhaust alignment and positioning
• Absorbs and reduces vibration from exhaust system
• Prevents excessive movement or sagging of the silencer
• Supports long-term durability of exhaust components
Exhaust straps are exposed to constant heat cycles, moisture, and road debris, which can lead to corrosion or fatigue over time. A worn or broken strap can cause the muffler to loosen or misalign, leading to noise, vibration, or damage to the exhaust system. Replacing it ensures secure mounting and preserves exhaust system integrity.
When to replace
• Visible corrosion, cracking, or fatigue
• Loose or sagging exhaust muffler
• Increased vibration or rattling noise
• During exhaust repair or replacement
• Missing or damaged mounting strap
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99311111907
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Exhaust Crush Sealing Ring for Heat Exchangers
Sold each - 6 required per car
Restore a gas-tight seal to your Porsche exhaust system with
this OE Match Exhaust Crush Sealing Ring,
designed for the Porsche 964 and Porsche 993 heat exchanger assembly.
Manufactured to original equipment specifications, this premium exhaust sealing
ring compresses during installation to create a secure seal between exhaust
components, preventing exhaust gas leaks while maintaining optimum engine
performance.
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
Diagram ref no 3
Whether you're replacing heat exchangers, installing a new silencer or carrying out engine or exhaust maintenance, fitting new crush sealing rings is essential to ensure a reliable and leak-free exhaust system.
What Does the Exhaust Crush Sealing Ring Do?
The exhaust crush sealing ring is installed between mating exhaust components where it forms a high-temperature gas seal once compressed during assembly.
Its primary functions include:
- Creating a gas-tight seal between exhaust components.
- Preventing exhaust gas leaks.
- Maintaining correct exhaust back pressure.
- Supporting optimum engine performance.
- Reducing unwanted exhaust noise.
- Helping protect surrounding components from escaping hot exhaust gases.
Because the sealing ring is designed to deform during installation, it provides a highly effective seal capable of withstanding extreme exhaust temperatures.
Why Do Exhaust Crush Sealing Rings Fail?
Exhaust sealing rings operate under constant exposure to
high temperatures and pressure. Common causes of failure include:
- Compression during initial installation.
- Reuse after previous removal.
- Continuous heat cycling.
- Corrosion from moisture and condensation.
- Exhaust system movement.
- Age-related deterioration.
Once compressed, the sealing ring cannot return to its original shape, making it unsuitable for reuse.
When Should the Exhaust Crush Sealing Ring Be Replaced?
Replacement is recommended whenever:
- Heat exchangers are removed.
- Exhaust silencers are replaced.
- Exhaust manifolds are dismantled.
- Exhaust leaks are detected.
- Engine rebuilds are carried out.
- Any exhaust joint using the sealing ring is disturbed.
Most Porsche specialists recommend fitting new crush sealing rings every time the exhaust system is dismantled to guarantee a proper seal and avoid future exhaust leaks.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99311119500
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97

Fits:
Porsche 993 C2 / C4 1994-98 (Not turbo)
Click 'Zoom in' for large parts diagram
Diagram Ref No 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99311111
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Made by Dansk
Fits:
Porsche 911 Carrera 3.2L 08/1983-07/1989
Porsche 911 SC / Carrera / 930 2.7-3.0L 08/1975-07/1983
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99311114599
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
Bolt required 90006736202

Fits:
Porsche 993 C2/4 1994-98 not turbo
Click 'Zoom in' for large parts diagram
Diagram Ref No 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99311111907
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
The OE MATCH Mounting Kit for Heat Exchangers provides replacement mounting and securing hardware required when installing or servicing compatible Porsche heat exchangers and associated exhaust components.
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Diagram Ref No 3, 4, 5, 6, 7, 8 And 12.
Heat exchangers operate in an extremely demanding area of the vehicle where mounting components are continually exposed to high exhaust temperatures, repeated heating and cooling cycles, vibration, moisture and road contamination. Over time, original fasteners and mounting hardware can corrode, seize, weaken or become damaged during removal.
What This Product Does:
The mounting kit provides hardware used to correctly locate and secure compatible heat exchangers and associated exhaust components.
Depending on the specific installation, the mounting hardware helps:
- Secure the heat exchanger in its intended position
- Maintain correct component alignment
- Provide reliable fastening under exhaust-system temperatures
- Resist movement caused by engine and exhaust vibration
- Maintain secure connections between associated components
- Reduce unwanted movement and rattling
- Support correct exhaust and heating-system installation
Correct mounting is important because heat exchangers form part of the exhaust system while also playing a role in the cabin heating arrangement on applicable air-cooled Porsche models.
Symptoms Of Wear Or Failure:
Mounting hardware should be inspected whenever the heat exchangers or surrounding exhaust components are serviced.
Common signs of deterioration include:
- Heavy corrosion
- Rusted nuts or bolts
- Seized fasteners
- Rounded fastener heads
- Damaged threads
- Missing hardware
- Loose mounting points
- Broken studs or fasteners
- Heat exchanger movement
- Exhaust rattling or vibration
- Difficulty maintaining correct exhaust alignment
- Fasteners that cannot be tightened correctly
- Hardware damaged during previous removal
- Visible deterioration around mounting locations
Severely corroded hardware should not automatically be reused simply because it can still be removed and refitted.
Why Replacement Matters:
Replacing worn, seized, corroded or damaged heat exchanger mounting hardware helps ensure that the exhaust and heating components remain correctly secured.
A fresh mounting kit can help:
- Restore secure heat exchanger installation
- Maintain correct exhaust alignment
- Reduce unwanted movement
- Reduce rattling and vibration
- Replace rusted or seized hardware
- Restore reliable fastening
- Reduce stress on connected exhaust components
- Improve future serviceability
- Support a professional heat exchanger installation
Ignoring deteriorated mounting hardware can compromise an otherwise correctly installed replacement heat exchanger.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
EXHFITTING.964.1
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Fits:
Porsche 964 C2/ C4 1989-93
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
EXHFITTING.964.1.1
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Fits:
Porsche 964 C2/ C4 1989-93
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
EXHFITTING.964.1.2
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Fits:
Porsche 964 C2/ C4 1989-93
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
EXHFITTING.964.1.3
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93