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- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
This long exhaust hexagon head bolt from OE Match has an M8 thread and a length of 140mm.
Fits
- Porsche 996 C2 / C4 / C4S 1998-05
- Porsche 996 GT3 2000-05
- Porsche 997 C2 / C4 / C2S / C4S 2005-08
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram ref no: 24
What This Product Does
This threaded fixing retains components within the exhaust assembly. Selecting the specified bolt length and thread is important when renewing damaged hardware or reassembling the exhaust after repairs.
Functions
- Fastens the relevant exhaust assembly components.
- Provides a hexagonal head for tool engagement.
- Replaces the long fixing at the identified diagram positions.
Technical Details
- Part number: 90037818301; long hexagon-head bolt, M 8 X 140.
- Supply unit: EACH. The supplied diagrams specify two bolts per illustrated assembly; this is not a two-piece pack.
Symptoms of Fault
- Rust, damaged threads or a fractured bolt.
- A fixing that seizes during dismantling.
- Loosening, rattling or movement around the fastening point.
- Difficulty achieving the specified tightening torque.
Why Replacement Matters
Heat cycling and corrosion can leave exhaust hardware difficult to remove or unsuitable for refitting. Renewing damaged fixings supports correct reassembly. Inspect adjoining brackets, nuts and other hardware rather than assuming the bolt alone accounts for a loose or noisy exhaust.
FAQs
- Are two bolts included?
No. Supply is EACH; the diagram quantity describes the assembly requirement. - Can I substitute a shorter bolt?
Use the length specified for the fastening position; this version measures 140mm. - Should anti-seize be applied?
Follow the applicable workshop instructions, including any requirements for thread preparation and tightening torque.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90037818301
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
M8. EACH
Fits:
Porsche 986 Boxster 1997-05
Porsche 987C Cayman 2005-08
Porsche 996 C2 / C4 / C4S 1997-05
Porsche 996 GT3 1999-05
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99908405202
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Mounting Kit for Catalytic Converter
Complete your Porsche exhaust installation with this OE
Match Catalytic Converter Mounting Kit. This comprehensive
installation kit contains all the essential hardware required to correctly fit
replacement catalytic converters or dummy catalytic pipes, ensuring a secure,
leak-free installation and long-lasting reliability.
Fits:
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Rather than reusing old, corroded or heat-damaged fasteners, this kit provides new clamps, exhaust gaskets, nuts and bolts, allowing professional-quality installation while reducing the risk of exhaust leaks, loose joints and seized fixings.
The kit is specifically designed for use with the following Design911 replacement components:
99611196260S, 996PO96260S, 996PO96270SWhether you're replacing worn catalytic converters, installing sports catalytic converters or fitting dummy catalytic pipes for motorsport applications, this OE Match mounting kit provides everything needed to complete the installation correctly.
Kit Contents
This complete fitting kit includes:
- Exhaust clamps
- Exhaust sealing gaskets
- Mounting nuts
- Mounting bolts
Everything required to securely install compatible catalytic converter or dummy catalytic pipe assemblies.
What Does the Mounting Kit Do?
The mounting kit secures the catalytic converter or replacement pipework to the exhaust system while providing a gas-tight seal between connecting flanges.
Its functions include:
- Securing the catalytic converter or replacement pipes.
- Creating leak-free exhaust joints.
- Maintaining correct exhaust alignment.
- Preventing exhaust gas leaks.
- Reducing vibration and movement.
- Ensuring reliable long-term installation.
Replacing the fitting hardware whenever exhaust components are changed helps ensure maximum durability and sealing performance.
Why Replace the Mounting Hardware?
Exhaust mounting hardware operates in one of the harshest
environments on the vehicle, exposed to:
- Extreme exhaust temperatures.
- Road salt and moisture.
- Corrosion.
- Thermal expansion and contraction.
- Rusted or seized fasteners.
- Exhaust vibration.
Attempting to reuse old hardware often results in broken bolts, poor sealing or premature exhaust leaks.
Signs Your Mounting Kit Should Be Replaced
Replacement is recommended if you notice:
- Rusted clamps.
- Corroded nuts or bolts.
- Damaged exhaust gaskets.
- Exhaust leaks.
- Loose catalytic converter connections.
- Broken or seized fixings.
- Exhaust rattles after installation.
Installing new hardware during every exhaust repair helps ensure a secure and reliable fit.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96260KIT
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Exhaust Hexagon Head Bolt (Short)
Sold each
Ensure a secure and reliable exhaust installation with this
OE Match Short Exhaust Hexagon Head Bolt.
Manufactured to the original factory specification, this provides the correct strength, thread specification and fit required for
securing exhaust components.
Fits:
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Diagram ref no 25
Exhaust hardware operates in one of the harshest environments on any vehicle, being subjected to extreme temperatures, vibration, corrosion and repeated heating and cooling cycles. This OE Match bolt is manufactured from high-quality materials to deliver dependable clamping force and long service life, making it ideal for routine repairs, exhaust upgrades or complete engine rebuilds.
What Does the Exhaust Hexagon Head Bolt Do?
The exhaust bolt is a critical fastening component within the exhaust system.
Its primary functions include:
- Securing exhaust components together.
- Maintaining correct clamping force between mating surfaces.
- Preventing exhaust leaks.
- Resisting loosening caused by vibration and thermal expansion.
- Helping maintain proper alignment of exhaust components.
- Supporting reliable long-term exhaust system performance.
Using the correct OE-specification fasteners helps ensure safe and leak-free exhaust operation.
Why Do Exhaust Bolts Need Replacing?
Exhaust bolts are continually exposed to harsh operating conditions.
Common causes of deterioration include:
- Corrosion caused by moisture and road salt.
- Extreme exhaust temperatures.
- Repeated heat cycles causing fatigue.
- Thread damage during removal.
- Seizure due to oxidation.
- Rounded or damaged bolt heads during servicing.
Once removed, older exhaust hardware is often unsuitable for reuse due to corrosion or loss of clamping performance.
When Should They Be Replaced?
Replacement is recommended when:
- Removing or replacing exhaust components.
- Installing new silencers, catalytic converters or manifolds.
- Repairing exhaust leaks.
- The original bolt is corroded or seized.
- Threads are damaged or worn.
- Carrying out engine or exhaust system restoration.
- Performing preventative maintenance during exhaust servicing.
Replacing exhaust hardware whenever the system is dismantled helps ensure reliable sealing and simplifies future maintenance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90037810501
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
EACH
Fits:
Porsche 986 Boxster 1997-04
Porsche 996 C2 / C4 3.4L >>2001
M96.01, M96.02, M96.03,
Porsche 996 GT3 / GT3 RS 2000-05
Porsche 997 GT3 2007-10
Click 'Zoom in' for large parts diagram.
Diagram ref no 4.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90037813100
The product you are viewing cross references to these numbers