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Exhaust head stud. Porsche 911T >>1973 - 99906200804
99906200804/1
Vehicle Group
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Information
Exhaust head stud
Sold each.
Fits
Porsche 911T >>1973
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99906200804
The product you are viewing cross references to these numbers
Sold each.
Fits
Porsche 911T >>1973
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99906200804
90006100801
90006100802
99906200802
99906200804
The product you are viewing cross references to these numbers
Price: £1.50
In stock
Related products
Vehicle Group
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Information
Exhaust Lock Nut For Bolt, M8.
Symptoms Of Wear Or Failure:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99908405202
The product you are viewing cross references to these numbers
The OE MATCH Exhaust Lock Nut for Bolt, M8 is a high-quality replacement fastening nut designed specifically for securing exhaust system components in high-temperature environments. Manufactured to OE specifications, this M8 lock nut features a self-locking design that helps maintain a secure connection despite constant vibration, thermal expansion, and harsh operating conditions.
Fits:
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Used throughout the exhaust system on various Porsche models, this lock nut helps ensure that exhaust flanges, brackets, heat exchangers, silencers, and other exhaust components remain securely fastened. Its heat-resistant construction makes it ideal for long-term durability and reliable exhaust system assembly.
What This Product Does:
- Secures exhaust system components and mounting hardware
- Provides a self-locking fastening solution
- Resists loosening caused by vibration and thermal cycling
- Maintains secure flange and bracket connections
- Supports exhaust system stability and alignment
- Designed for high-temperature exhaust applications
Symptoms Of Wear Or Failure:
- Loose exhaust components or brackets
- Exhaust rattles or vibration noises
- Exhaust leaks at flange connections
- Corroded, seized, or damaged threads
- Difficulty maintaining correct fastening torque
- Missing or broken fastening hardware
- Exhaust misalignment or movement
- Increased wear on adjoining exhaust components
Why Replacement Matters:
- Restores secure fastening of exhaust components
- Prevents loosening caused by vibration and heat cycles
- Helps maintain proper exhaust alignment
- Reduces the risk of exhaust leaks and rattles
- Protects exhaust flanges, brackets, and mountings from movement-related damage
- Ensures safe and reliable exhaust system operation
- Supports long-term durability in harsh exhaust environments
- Provides OE-quality fit, performance, and reliability
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99908405202
99908405202
90091000303
The product you are viewing cross references to these numbers
Price: £2.15
In stock
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 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 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
Information
Exhaust hex nut for heat exchanger
OE Match exhaust hex nut designed as a direct-fit replacement fastener for the exhaust heat exchanger studs on classic Porsche 911 (1965–1998) engines. This hex nut secures the heat exchanger to the cylinder heads and exhaust studs, ensuring reliable fastening in the high-heat exhaust system environment.
Sold individually. 4, 5, or 6 required, depending on car model.
Fits:
Porsche 911 1965-89 (6 for both heat exchangers)
Porsche 964 Carrera 1989-94 (4 for both heat exchangers)
Porsche 993 Carrera 1994-98 (5 for both heat exchangers)
Porsche 993 Turbo 1994-98 (4 for both heat exchangers)
Diagram ref no 5
The hex nut is used in conjunction with the heat exchanger studs and exhaust system components to clamp the exhaust heat exchanger securely in place and maintain a sealed joint between mating parts.
The exhaust hex nut’s role may seem simple, but it’s critical to the integrity of the heat exchanger and exhaust assembly:
• Secures the heat exchanger studs to the engine block/exhaust flange
• Maintains clamp force under thermal cycling and vibration
• Helps prevent exhaust leaks at the heat exchanger interface
• Resists corrosion and heat exposure typical of exhaust temperatures.
Proper fastening ensures that the heat exchanger - which routes exhaust gasses away from the cylinders and towards the muffler system - remains sealed and aligned throughout engine operation.
Function
• Fastening: Threads onto the exhaust/heat exchanger stud to clamp components
• Retention: Holds joint integrity under vibration and thermal expansion
• Seal support: Helps maintain exhaust system seal and prevents leaks
• Heat resilience: Engineered from heat-resistant material for exhaust applications.
Worn, rusted, or missing hex nuts can lead to loose exhaust joints, exhaust leaks, poor performance, and increased noise.
Although small, exhaust hex nuts play a critical role in maintaining proper heat exchanger sealing and long-term exhaust durability. Over time, exposure to extreme heat and exhaust gases can cause nuts to corrode, seize, lose clamping force, or break during removal, leading to exhaust leaks and compromised sealing at the cylinder head. Replacing them with OE Match hex nuts restores secure fastening, helps prevent leaks, protects surrounding engine components from excess heat, and preserves overall exhaust performance.
Exhaust hex nuts should be replaced whenever the heat exchanger or exhaust system is removed, if the existing nuts are corroded, seized, rounded, or damaged, or when exhaust leaks are detected at the heat exchanger interface.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99908500103
The product you are viewing cross references to these numbers
OE Match exhaust hex nut designed as a direct-fit replacement fastener for the exhaust heat exchanger studs on classic Porsche 911 (1965–1998) engines. This hex nut secures the heat exchanger to the cylinder heads and exhaust studs, ensuring reliable fastening in the high-heat exhaust system environment.
Sold individually. 4, 5, or 6 required, depending on car model.
Fits:
Porsche 911 1965-89 (6 for both heat exchangers)
Porsche 964 Carrera 1989-94 (4 for both heat exchangers)
Porsche 993 Carrera 1994-98 (5 for both heat exchangers)
Porsche 993 Turbo 1994-98 (4 for both heat exchangers)
Diagram ref no 5
The hex nut is used in conjunction with the heat exchanger studs and exhaust system components to clamp the exhaust heat exchanger securely in place and maintain a sealed joint between mating parts.
The exhaust hex nut’s role may seem simple, but it’s critical to the integrity of the heat exchanger and exhaust assembly:
• Secures the heat exchanger studs to the engine block/exhaust flange
• Maintains clamp force under thermal cycling and vibration
• Helps prevent exhaust leaks at the heat exchanger interface
• Resists corrosion and heat exposure typical of exhaust temperatures.
Proper fastening ensures that the heat exchanger - which routes exhaust gasses away from the cylinders and towards the muffler system - remains sealed and aligned throughout engine operation.
Function
• Fastening: Threads onto the exhaust/heat exchanger stud to clamp components
• Retention: Holds joint integrity under vibration and thermal expansion
• Seal support: Helps maintain exhaust system seal and prevents leaks
• Heat resilience: Engineered from heat-resistant material for exhaust applications.
Worn, rusted, or missing hex nuts can lead to loose exhaust joints, exhaust leaks, poor performance, and increased noise.
Although small, exhaust hex nuts play a critical role in maintaining proper heat exchanger sealing and long-term exhaust durability. Over time, exposure to extreme heat and exhaust gases can cause nuts to corrode, seize, lose clamping force, or break during removal, leading to exhaust leaks and compromised sealing at the cylinder head. Replacing them with OE Match hex nuts restores secure fastening, helps prevent leaks, protects surrounding engine components from excess heat, and preserves overall exhaust performance.
Exhaust hex nuts should be replaced whenever the heat exchanger or exhaust system is removed, if the existing nuts are corroded, seized, rounded, or damaged, or when exhaust leaks are detected at the heat exchanger interface.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99908500103
99908500102
99908500103
99908500101
The product you are viewing cross references to these numbers
Price: £2.25
In stock
Vehicle Group
- 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) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
Information
Exhaust muffler stap bolt, M8 x 50
This Exhaust Muffler Strap Bolt is an OE Match fastening bolt designed to secure the exhaust muffler strap to the vehicle. It is a critical mounting component within the Porsche 993 exhaust system.
Sold individually, 2 required per vehicle (1 per muffler)
Fits:
Porsche 993 1995 - 1998
Length 50mm
Outer Thread 8mm
Thread Size 1.25
Diagram ref no 37
This OE Match exhaust strap bolt is a direct replacement for the original Porsche fastener used to mount the muffler retaining strap. Designed to factory specifications, it features a pan-head M8 x 50mm configuration, ensuring proper fitment and secure fastening
This component is specifically used in conjunction with the exhaust muffler strap (e.g. 99311111907) to hold the silencer firmly in place, maintaining correct exhaust alignment and structural integrity.
This bolt secures the muffler strap to the mounting point, ensuring the exhaust silencer remains properly positioned. It helps prevent movement, vibration, and misalignment of the exhaust system during operation.
Function
• Secures exhaust muffler strap to chassis mounting point
• Maintains correct positioning of exhaust silencer
• Prevents loosening under vibration and heat cycles
• Supports stable and secure exhaust system mounting
• Ensures long-term fastening reliability in high-temperature conditions
Exhaust fasteners are exposed to extreme heat, moisture, and road debris, which can cause corrosion, seizure, or thread damage. A worn or incorrect bolt may lead to loose exhaust components, increased vibration, or misalignment. Replacing it ensures secure fastening and proper exhaust system stability.
When to replace
• During exhaust or muffler strap replacement
• Bolt is corroded, seized, or damaged
• Loose or rattling exhaust components
• Signs of thread wear or stripped head
• Preventative replacement during exhaust maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90006736201
The product you are viewing cross references to these numbers
This Exhaust Muffler Strap Bolt is an OE Match fastening bolt designed to secure the exhaust muffler strap to the vehicle. It is a critical mounting component within the Porsche 993 exhaust system.
Sold individually, 2 required per vehicle (1 per muffler)
Fits:
Porsche 993 1995 - 1998
Length 50mm
Outer Thread 8mm
Thread Size 1.25
Diagram ref no 37
This OE Match exhaust strap bolt is a direct replacement for the original Porsche fastener used to mount the muffler retaining strap. Designed to factory specifications, it features a pan-head M8 x 50mm configuration, ensuring proper fitment and secure fastening
This component is specifically used in conjunction with the exhaust muffler strap (e.g. 99311111907) to hold the silencer firmly in place, maintaining correct exhaust alignment and structural integrity.
This bolt secures the muffler strap to the mounting point, ensuring the exhaust silencer remains properly positioned. It helps prevent movement, vibration, and misalignment of the exhaust system during operation.
Function
• Secures exhaust muffler strap to chassis mounting point
• Maintains correct positioning of exhaust silencer
• Prevents loosening under vibration and heat cycles
• Supports stable and secure exhaust system mounting
• Ensures long-term fastening reliability in high-temperature conditions
Exhaust fasteners are exposed to extreme heat, moisture, and road debris, which can cause corrosion, seizure, or thread damage. A worn or incorrect bolt may lead to loose exhaust components, increased vibration, or misalignment. Replacing it ensures secure fastening and proper exhaust system stability.
When to replace
• During exhaust or muffler strap replacement
• Bolt is corroded, seized, or damaged
• Loose or rattling exhaust components
• Signs of thread wear or stripped head
• Preventative replacement during exhaust maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90006736201
90006702002
90006736202
90006736201
N0147512
The product you are viewing cross references to these numbers
Price: £1.10
In stock