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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://design91.uk/images/schemaLogo.png https://design91.uk/images/schemaLogo.png +443456003478 https://design91.uk Facebook Instagram

Exhaust Nuts / Bolts / Studs

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DISPLAYING 1 to 16 (of 19 products)
1 2
MANIFOLDKIT964
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 964


Special Order item
90007507803
Product Information
Product Information
Hex head bolt for suspension bracket of centre silencer.
porsche

Fits:
Porsche 964 C2/4 1989-94 (Not turbo)

Click 'Zoom in' for large parts diagram.
Diagram Ref No 3

Old part number:
- 90007507802

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Related, superseded, cross reference or alternative numbers for comparison.

90007507803
90007507803
90007507802

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Special Order item
90007433902
Product Information
Product Information
Exhaust Bolt for Exhaust Clamp. M8 x 70.
porsche

Fits:
Porsche 964 C2 / C4 / RS 1990-94
Porsche 964 (965) Turbo 1991-93

Click 'Zoom in' for large parts diagram.
Diagram ref no 8.

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90007433902
90007433902

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Special Offer
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
Special Offer
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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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)



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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)



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Related, superseded, cross reference or alternative numbers for comparison.

99908500103
99908500102
99908500103
99908500101

The product you are viewing cross references to these numbers
Special Offer
99908405202/1
Product Information
Product Information
Exhaust Lock Nut for Bolt. M8.
Replacement lock nut for bolt.

oematch

Fits:
Porsche 964 C2 / C4 1989-94

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

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99908405202
99908405202
90091000303

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Special Order item
90006730900
Product Information
Product Information
Exhaust strap screw.

porsche

Fits:
Porsche 964 C2/4 1989-94 (Not turbo)

Click 'Zoom in' for large parts diagram.
Diagram Ref No 12

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90006730900
90006730900
1625002900

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Special Offer
99908405202T
Product Information
Product Information
Exhaust Lock Nut for Bolt. M8. Made out of Titanium.
Fits onto silencer and tail pipe o-ring clamps.

rohler

Fits:
Porsche 964 C2 / C4 1989-94

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

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

99908405202T
99908405202

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Special Order item
99902512501
Product Information
Product Information
Exhaust Washer for Bolt. 8.4 x 17 x 3.1.


porsche

Replacement washer, fits between silencer & tail pipe

Fits:
Porsche 964 C2 / C4 1989-94

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

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



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99902512501
99902512501
99902512509

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Special Order item
90007431101
Product Information
Product Information
Bolt for rear muffler suspension bracket.

porsche

Fits:
Porsche 964 C2 / C4 1989-93

Old numbers:
- 90007431101

Diagram ref no 16

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

90007431101
90007431101
90007431108

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Special Order item
90091000301
Product Information
Product Information
Nut for rear muffler suspension bracket.

porsche

Fits:
Porsche 964 C2 / C4 1989-93

Old numbers:
- 99908409502

Click 'Zoom in' for large parts diagram.
Diagram ref no 18

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

90091000301
90091000301
99908409502
523.720

The product you are viewing cross references to these numbers
Special Order item
90022300103
Product Information
Product Information
Washer for rear muffler suspension bracket.

Fits:
Porsche 964 C2 / C4 1989-93

Diagram ref no 15

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90022300103
90022300102
90022300103

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Special Order item
90007535400
Product Information
Product Information
Screw for exhaust heat shields.
porsche

Fits:
Porsche 964 C2 / C4 1989-93

Click 'Zoom in' for large parts diagram.
Diagram ref no 21

Price is for each.

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90007535400
90007535400

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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
DISPLAYING 1 to 16 (of 19 products)
1 2
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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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