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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 24 products)
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MANIFOLDKIT911E
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 911 1965-83


FITTINGKIT30
Product Information
Product Information

Mounting kit for heat exchanger.

oematch

Fits:
Porsche 911 E/S (mech. injection) 2.4ltr / 2.7ltr - 08/1971 to 07/1976
Porsche 911 T (not mech. injection) 2.0ltr / 2.4ltr - 01/1963 to 07/1973
Porsche 911 / 911S / 911 Carrera 2.7ltr - 08/1973 to 07/1975

Kit includes:
3 x heat exchanger gaskets
1 x rear silencer gasket
2 x M10 silencer bolt
2 x M10 silencer nut
3 x M8 heat exchanger nut
3 x M8 beat exchanger barrel nut
1 x M6 nut
1 x M6 washer, nuts & bolts



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Related, superseded, cross reference or alternative numbers for comparison.

FITTINGKIT30
90111119300
93011119001
9000760250C
90007602502
99908500103
99908500102
9000751480Y
99908400202
N 02214812
90002800801

The product you are viewing cross references to these numbers
90007428202/2
Product Information
Product Information
Exhaust bolt. M8 x 40. Stainless Steel Bolt
EACH

oematch

Fits:
Porsche 911 1974-89

Used though out the system.
Diagram ref no 9.


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Related, superseded, cross reference or alternative numbers for comparison.

90007428202
90007428202

The product you are viewing cross references to these numbers
90007428202/1
Product Information
Product Information
Exhaust bolt. M8 x 40. Standard bolt.
EACH

oematch

Fits:
Porsche 911 1974-89

Used though out the system.
Diagram ref no 9.


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Related, superseded, cross reference or alternative numbers for comparison.

90007428202
90007428202

The product you are viewing cross references to these numbers
Special Order item
90007428203
Product Information
Product Information
Exhaust Bolt. M8 x 40.
Used though out the system.
Sold each.

Fits:
Porsche 911 1974 - 1989

Diagram ref no 9.

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Related, superseded, cross reference or alternative numbers for comparison.

90007428203
90007428202
90007428203

The product you are viewing cross references to these numbers
90006010601T
Product Information
Product Information
Exhaust head stud. Made out of Titanium (Grade 5 Ti-6Al-4V) M8 x 22
Sold each.

rohler

Fits
Porsche 911 1965 - 83

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

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Related, superseded, cross reference or alternative numbers for comparison.

90006010601T
90006100701
90006100702
99906200702
90006010601
99906200603

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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 Order item
99906200602
Product Information
Product Information
Exhaust head stud, L - 36mm.
Sold each.

porsche

Fits
Porsche 911 2.7L / 3.0L 1974-83

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

99906200602
99906200602

The product you are viewing cross references to these numbers
99906200602/1
Product Information
Product Information
Exhaust head stud, L - 36mm
Sold each.

Fits
Porsche 911 2.7L / 3.0L 1974-83

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

99906200602
99906200602

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)



Related reference numbers
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
Special Order item
9009100970C
Product Information
Product Information
Exhaust nut.
EACH
Used though out the system.

Fits:
Porsche 911 1974 - 1989

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

9009100970C
90091009702
9009100970C

The product you are viewing cross references to these numbers
9009100970C/1
Product Information
Product Information
Exhaust nut.
EACH
Used though out the system.

Fits:
Porsche 911 1974 - 1989

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

9009100970C
90091009702
9009100970C

The product you are viewing cross references to these numbers
Special Order item
90006716102
Product Information
Product Information
Exhaust Muffler Strap Bolt. AM 10 x 50.

porsche

Fits:
Porsche 911 1965-89
Porsche 911 (930) Turbo 1975-89

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

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

90006716102
90111115704
90006716102

The product you are viewing cross references to these numbers
99908400202
Product Information
Product Information
M10 Nut for Exchanger to Muffler Bolt.

oematch

Fits:
Porsche 911 1969-77
Porsche 914-6 1970-76
Porsche 924 1976-79

Click 'Zoom in' for large parts diagram.
Diagram ref no 7

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

99908400202
99908400202

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 24 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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