Please wait… 
Please wait while we process your order,
do not press the back button…
do not press the back button…
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
Category Filter
Exhaust Lock Nut for Bolt. Porsche 965 Turbo - 99908405202
99908405202/1::2
Vehicle Group
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Information
Exhaust Lock Nut For Bolt.
The OE Match Exhaust Lock Nut for Bolt is a high-quality replacement fastening component designed to securely retain exhaust system bolts in high-temperature operating environments. Manufactured to OE specifications for thread accuracy, strength and heat resistance, this self-locking nut helps maintain secure exhaust connections while resisting loosening caused by heat cycles, vibration and engine movement.
Fits:
Diagram Ref No 25
Manufactured from high-strength, corrosion-resistant steel with a durable heat-resistant finish, the lock nut is specifically engineered for use within Porsche exhaust systems. Its self-locking design provides reliable clamping force, helping to maintain leak-free exhaust joints and ensuring long-term reliability of exhaust manifold, catalytic converter, silencer and pipework connections where applicable.
What This Product Does:
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Related, superseded, cross reference or alternative numbers for comparison.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 is a high-quality replacement fastening component designed to securely retain exhaust system bolts in high-temperature operating environments. Manufactured to OE specifications for thread accuracy, strength and heat resistance, this self-locking nut helps maintain secure exhaust connections while resisting loosening caused by heat cycles, vibration and engine movement.
Fits:
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Diagram Ref No 25
Manufactured from high-strength, corrosion-resistant steel with a durable heat-resistant finish, the lock nut is specifically engineered for use within Porsche exhaust systems. Its self-locking design provides reliable clamping force, helping to maintain leak-free exhaust joints and ensuring long-term reliability of exhaust manifold, catalytic converter, silencer and pipework connections where applicable.
What This Product Does:
- Securely fastens exhaust system components together.
- Maintains consistent clamping force under high temperatures.
- Resists loosening caused by vibration and thermal expansion.
- Helps prevent exhaust gas leaks.
- Supports correct exhaust alignment.
- Provides reliable fastening for exhaust repairs and installations.
- Replaces worn, corroded or damaged original lock nuts.
- Forms an essential part of the exhaust mounting system.
Symptoms Of Wear Or Failure:
- Loose exhaust components.
- Exhaust blowing or gas leaks.
- Rattling or vibrating exhaust system.
- Corroded or seized fasteners.
- Damaged or stripped threads.
- Loss of locking capability.
- Broken or missing fixing hardware.
- Difficulty maintaining correct exhaust alignment.
- Increased exhaust noise.
- Visible rust or deterioration of the fastening hardware.
Why Replacement Matters:
- Exhaust fasteners operate in one of the harshest environments on the vehicle, where they are exposed to extreme temperatures, rapid heating and cooling cycles, moisture, road salt and constant vibration. Over time, conventional fasteners can corrode, seize or lose their clamping force, allowing exhaust joints to loosen.
- A worn or damaged lock nut can result in exhaust leaks, excessive movement and increased stress on surrounding exhaust components. Loose exhaust connections may also generate unwanted noise, reduce exhaust efficiency and accelerate wear of gaskets and mounting hardware.
- Replacing exhaust lock nuts whenever exhaust components are serviced helps ensure secure, long-lasting connections and reliable sealing. An OE Match replacement provides factory-style fitment, high-strength construction and excellent resistance to heat and corrosion, helping maintain the durability, performance and reliability of your Porsche's exhaust system.
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: €2.54
In stock
Related products
Vehicle Group
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- 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 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 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) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Information
Spring washer A10 - Used in various positions
Fits:
Porsche 911 - 1978 to 1983
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 924 / 924S - 1980 to 1988
Porsche 944 - 1982 to 1991
Porsche 928 - 1978 to 1995
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG012231A
The product you are viewing cross references to these numbers
Fits:
Porsche 911 - 1978 to 1983
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 924 / 924S - 1980 to 1988
Porsche 944 - 1982 to 1991
Porsche 928 - 1978 to 1995
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG012231A
90002800502
N0122314
PCG012231A
The product you are viewing cross references to these numbers
Price: €1.50
In stock
Vehicle Group
- 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)
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 914 (1970-1976)
Information
Hex Head Bolt M8 x 16 used in various locations
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90007508704
The product you are viewing cross references to these numbers
Sold each
Fits:
- 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)
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 914 (1970-1976)
The Hex Head Bolt M8 x 16 is a versatile, high-strength fastener used in multiple locations across classic Porsche models—including the Porsche 911, 914, 924 and 928. As a critical component in securing brackets, covers, engine parts, underbody panels and suspension-related hardware, this bolt ensures structural integrity and reliability throughout the vehicle.
What This Bolt Does
The Hex Head Bolt M8 x 16 plays a crucial role in securing various mechanical and body components on a Porsche.
Common Functions
- Secures brackets, panels and trim pieces
- Anchors engine and drivetrain components
- Holds suspension hardware and mountings
- Fastens interior and underbody parts
- Provides structural rigidity where load-bearing fasteners are required
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90007508704
90007508702
90007508703
90007508704
The product you are viewing cross references to these numbers
Price: €1.18
In stock