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Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://www.design91.uk/images/schemaLogo.png https://www.design91.uk/images/schemaLogo.png +443456003478 https://www.design91.uk Facebook Instagram

Exhaust Nuts / Bolts / Studs

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DISPLAYING 1 to 14 (of 14 products)
MANIFOLDKIT993
Product Information
Product Information

Exhaust heat exchanger fitting kit. Includes studs and nuts made out of titanium.

These titanium components are resistant to rust and corrosion, which can be a common issue with traditional steel studs and nuts. This corrosion resistance ensures that the studs and nuts maintain their integrity, allowing for easy removal and installation when necessary. They are the perfect upgrade for Porsche enthusiasts who demand the ease of access to vehicle's exhaust system.

rohler

Fits:
Porsche 993
Special Order item
90007425202
Product Information
Product Information
Exhaust Bolt for Clamp. M8 x 65.
Replacement bolt for clamp


porsche

Fits:
Porsche 993 1994-98
Porsche 993 Turbo

Diagram Ref no 9.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90007425202
90007425202

The product you are viewing cross references to these numbers
TITANSTUDS12
Product Information
Product Information
These titanium components are resistant to rust and corrosion, which can be a common issue with traditional steel studs and nuts. This corrosion resistance ensures that the studs and nuts maintain their integrity, allowing for easy removal and installation when necessary. They are the perfect upgrade for Porsche enthusiasts who demand the ease of access to vehicle's exhaust system. 

rohler

• Ultra-high-performance product
• Use of Titanium Ti6Al4V technology

Contains
12 x Studs, Nuts & Washers

Fits:
Porsche 911 1965-77
Porsche 964 (none Turbo)
Porsche 993 All
Porsche 996 (none Turbo)
Porsche 997 (none Turbo)
Porsche 986 All
Porsche 987 All
Porsche 718 4 Cyl Turbo

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

TITANSTUDS12
99906200602
99908400201
99908400201
90006010601
99907507100
90037813100
9990750710A
99907507400
90037813100
90007428702
99907353501
99907358901

The product you are viewing cross references to these numbers
99908500103T
Product Information
Product Information
Exhaust hex nut for heat exchanger. Made out of Titanium (Grade 5 Ti-6Al-4V)

rohler

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)



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Related, superseded, cross reference or alternative numbers for comparison.

99908500103T
99908500102
99908500103
99908500101

The product you are viewing cross references to these numbers
Special Order item
99908500103
Product Information
Product Information
Exhaust hexnut for heat exchanger
3 per heat exchanger.

porsche

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)



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
99908500103/1
Product Information
Product Information
Exhaust hexnut for heat exchanger

oematch

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)



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
99908405202/1::1
Product Information
Product Information
Exhaust Lock Nut for Bolt. M8.
Replacement lock nut for bolt.

oematch

Fits:
Porsche 993 1994-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

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
99908405202T::1
Product Information
Product Information
Exhaust Lock Nut for Bolt. M8. Made out of Titanium. 

Fits onto cat to silencer and silencer to tail pipe o-ring clamps. 

rohler

Fits:
Porsche 993 1994-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 11



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99908405202T
99908405202

The product you are viewing cross references to these numbers
Special Order item
99902512501::1
Product Information
Product Information
Exhaust Washer for Bolt.

 
porsche

Replacement washer, fits between silencer & tail pipe

Fits:
Porsche 993 1994-98

This product supersedes Porsche's old part numbers:
- 99902512509

Click 'Zoom in' for large parts diagram.
Diagram ref no 10.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99902512501
99902512501
99902512509

The product you are viewing cross references to these numbers
Special Order item
99902512501::3
Product Information
Product Information
Exhaust Washer for Bolt.

 
porsche

Replacement washer, fits between silencer & tail pipe

Fits:
Porsche 993 Turbo 1994-98

This product supersedes Porsche's old part numbers:
- 99902512509

Click 'Zoom in' for large parts diagram.
Diagram ref no 10.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99902512501
99902512501
99902512509

The product you are viewing cross references to these numbers
SL-In-12
Product Information
Product Information
High performance stud + nut kits for the exhaust manifold to cylinder head for Porsche. Using titanium and Inconel alloy studs, aerospace lock nuts, and a well-thought and balanced combination of metals and plating/coatings, our fasteners will perform better than the traditional fastener. They will never oxidize, and hence will unscrew easily when required.

silverlake

Novel ultra-high-performance product
• Use of Inconel 718 and aerospace technology
• Extreme perceived quality

Contains 12 x Studs, Nuts & Washers

Fits:
Porsche 911 1965-77
Porsche 964 (non Turbo)
Porsche 993 All
Porsche 996 (non Turbo)
Porsche 997 (non Turbo)
Porsche 986 All
Porsche 987 All
Porsche 718 4 Cyl Turbo

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

SL-In-12
99906200602
99908400201
99908400201
90006010601
99907507100
90037813100
9990750710A
99907507400
90037813100
90007428702
99907353501
99907358901

The product you are viewing cross references to these numbers
Special Order item
99908409401
Product Information
Product Information
Lock nut M6.
Used for various applications

porsche

Fits:
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1997



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99908409401
99908409402
99908409401

The product you are viewing cross references to these numbers
Special Order item
N0122314
Product Information
Product Information
Spring washer A10 - Used in various positions

porsche

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.

N0122314
90002800502
N0122314
N 0122314

The product you are viewing cross references to these numbers
SL-Ti-121
Product Information
Product Information
High performance stud + nut kits for the exhaust manifold to cylinder head for Porsche. Using titanium and Inconel alloy studs, aerospace lock nuts, and a well-thought and balanced combination of metals and plating/coatings, our fasteners will perform better than the traditional fastener. They will never oxidize, and hence will unscrew easily when required.

silverlake

Novel ultra-high-performance product
• Use of Titanium Ti6Al4V technology
• Extreme perceived quality

Contains 12 x Studs, Nuts & Washers

Fits:
Porsche 911 1965-77
Porsche 964 (none Turbo)
Porsche 993 All
Porsche 996 (none Turbo)
Porsche 997 (none Turbo)
Porsche 986 All
Porsche 987 All
Porsche 718 4 Cyl Turbo

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

SL-Ti-121
99906200602
99908400201
99908400201
90006010601
99907507100
90037813100
9990750710A
99907507400
90037813100
90007428702
99907353501
99907358901

The product you are viewing cross references to these numbers
DISPLAYING 1 to 14 (of 14 products)
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About Exhaust Nuts / Bolts / Studs

Exhaust Nuts, Bolts & Studs for Porsche | Secure Fitment for High-Performance Exhaust Systems

Your Porsche’s exhaust system operates under extreme heat, vibration, and pressure — making durable fasteners like exhaust nuts, bolts, and studs essential for reliability and safety. These components secure exhaust manifolds, catalytic converters, mufflers, and pipes together, maintaining a tight seal and precise alignment throughout the system.

At Design911, we offer a wide selection of standard and precision-engineered exhaust fasteners designed to meet or exceed manufacturer specifications. Made from heat-resistant, corrosion-proof materials, these nuts, bolts, and studs ensure long-lasting performance, perfect fitment, and effortless installation for both standard and performance exhaust systems.

Whether you’re rebuilding a classic 911 or servicing a modern Porsche GT model, our high-strength exhaust fixing hardware provides superior durability and resistance to loosening under thermal cycling.

What Do Exhaust Nuts, Bolts & Studs Do?

These components are the backbone of the exhaust system’s structural integrity. They keep all exhaust sections securely connected, ensuring no movement or leaks under load.

Core Functions:

  • Secure exhaust joints and flanges between manifolds, catalytic converters, and pipes.
  • Maintain consistent exhaust pressure by preventing gaps or misalignment.
  • Reduce vibration and mechanical stress.
  • Enable easy serviceability for exhaust maintenance or upgrades.
  • Ensure safe operation under high heat and pressure.

Without robust fasteners, even the most advanced exhaust systems can suffer from leaks, rattling, or part failure — leading to reduced performance and increased emissions.

Why Do Exhaust Fasteners Fail?

Exhaust nuts, bolts, and studs operate in one of the harshest environments in a vehicle. Over time, exposure to heat, moisture, and vibration can degrade even the strongest materials.

Common Causes of Failure Include:

  • Corrosion or rust from moisture and road salt.
  • Thermal expansion causing loosening or cracking.
  • Over-torquing during installation.
  • Metal fatigue from repeated heating and cooling cycles.
  • Cross-threading or thread stripping during servicing.

When fasteners fail, exhaust leaks, rattling, and poor gas flow can occur — impacting performance, sound, and emissions compliance.

Why Replace or Upgrade Your Exhaust Fasteners?

Replacing worn or rusted exhaust hardware is vital for ensuring the longevity and reliability of your Porsche’s exhaust system.

Key Benefits:

  • Restores exhaust system integrity and secure fitment.
  • Prevents leaks, rattles, and misalignment. Improves exhaust flow and performance reliability.
  • Crafted from high-strength stainless steel or coated alloy.
  • Direct-fit compatibility for Porsche 911, Cayman, Boxster, Panamera & Macan.
  • Ideal for both restoration and performance applications.

High-quality fasteners not only provide peace of mind during installation but also withstand years of performance driving without corrosion or seizing.

Highlights:

  • Premium exhaust nuts, bolts & studs for Porsche vehicles.
  • Designed for high-heat, high-vibration environments.
  • Prevents leaks and loosening in the exhaust system.
  • Heat- and corrosion-resistant stainless steel construction.
  • Ideal for rebuilds, upgrades, or performance tuning.
  • Precision-engineered to manufacturer standards.

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