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Exhaust Nuts / Bolts / Studs

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DISPLAYING 17 to 28 (of 28 products)
1 2
Special Order item
99907507400
Product Information
Product Information
Exhaust Manifold Bolt. M8 x 26.
EACH - 12 Per car

porsche

Fits:
Porsche 997 C2 / C4 / C2S / C4S


Porsche Boxster 987 2.7L 2005 -08/08

Porsche Boxster 987 3.2/3.4L 2005-08/08

Porsche 997 Carrera 2 3.6L 2005>>

Porsche 997 Carrera 2S 3.8L 2005>>

Porsche 997 Carrera 4 3.6L 2005>>

Porsche 997 Carrera 4S 3.8L 2005>>

Porsche Cayman 2.7L 987C 2006-08

Porsche Cayman S 3.4L 987C 2005-08


Diagram ref no 4.



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Related, superseded, cross reference or alternative numbers for comparison.

99907507400
99907507400

The product you are viewing cross references to these numbers
Special Order item
90037822701
Product Information
Product Information
Exhaust Manifold Bolt. A M8 x 28.
porsche
EACH

Fits:
Porsche 997 Turbo 2007-09
Porsche 997 Turbo GT2 2008-09
Porsche 997 GT2 RS 2011

Click 'Zoom in' for large parts diagram.
Diagram ref no 4.

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90037822701
90037822701

The product you are viewing cross references to these numbers
Special Offer
N01024426/T
Product Information
Product Information
Exhaust Bolt - Manifold to Catalytic Converter. M8 x 30
Material:  Titanium 
Price is EACH

rohler

Fits:
Porsche 997 MKI C2 / C4 / C2S / C4S
Porsche 997 MKII C2 / C4 / C2S / C4S
Porsche 991 MKI C2 / C4 / C2S / C4S

Porsche 987 Boxster MKI
Porsche 987 Boxster MKII
Porsche 981 Boxster MKI

Porsche 987C Cayman MKI
Porsche 987C Cayman MKII
Porsche 981C Cayman MKII

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N01024426
90007536502
N01024426

The product you are viewing cross references to these numbers
Special Order item
N01024426
Product Information
Product Information
Exhaust Manifold to Catalytic Converter Bolt.
M8 x 30. EACH

porsche

Fits:
Porsche 997 MKI C2 / C4 / C2S / C4S
Porsche 997 MKII C2 / C4 / C2S / C4S
Porsche 991 MKI C2 / C4 / C2S / C4S

Porsche 987 Boxster MKI
Porsche 987 Boxster MKII
Porsche 981 Boxster MKI

Porsche 987C Cayman MKI
Porsche 987C Cayman MKII
Porsche 981C Cayman MKII

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N01024426
90007536502
N01024426

The product you are viewing cross references to these numbers
Special Offer
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

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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
90011900100
Product Information
Product Information
Pan head screw 5 x 12mm. 

porsche

Fits:
Porsche 996 turbo  - 2001 to 2005
Porsche 997 turbo - 2007 to 2009

Click 'Zoom in' for large parts diagram.
Diagram ref no 23



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90011900100
90011900100

The product you are viewing cross references to these numbers
Special Order item
99611122900
Product Information
Product Information
Silencer bracket Damper. Porsche 996 / 996 GT3
porsche

Fits:
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-11
Porsche 991 GT3 2013-17
Porsche 991 GT3 RS / R 2014-17
Porsche 991.2 GT3 / RS 2017-20 (not for Speedster)


Click 'Zoom in' for large parts diagram.
Diagram ref no 34

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99611122900
99611122900

The product you are viewing cross references to these numbers
Special Order item
99611128170
Product Information
Product Information
Sleeve For Exhaust System Heat Shield.
Sold Each.
x20 Required Per Car.

Fits:
Porsche 997.1 Turbo / GT2 MKI 2007>>2009

Diagram Ref No 28

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99611128170
99611128170

The product you are viewing cross references to these numbers
Special Offer
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
Special Offer
SL-TI-18
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 18 x Studs, Nuts & Washers

Fits:
Porsche 996 Turbo / GT3 / GT2
Porsche 997 Turbo / GT3 / GT2
Porsche 997.2 ALL
Porsche 991 ALL
Porsche 992 ALL
Porsche 987 2009-12
Porsche 981
Porsche 718 GT4

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

SL-TI-18
90037813100
90037822709
99907507400
90037822701
99907353501
99907507400
99907353501
99907507400

The product you are viewing cross references to these numbers
SL-EX-02
Product Information
Product Information
Titanium exhaust tip titanium fastenings

silverlake

Fits
Porsche 997 GT3
Porsche 997 GT3 RS
Both Gen 1 and Gen 2
Porsche 991 GT3
Porsche 991 GT3 RS

Titanium exhaust fastener kit for Porsche 911 GT3/GT3RS style exhaust tips.

The kit includes 3x titanium flange nuts and 3 correct washers (two off-centered, and a standard washer).

Lighter than steel, they will not corrode and look good indefinitely.

The black nuts and washers are black titanium nitride coated, the silver, raw titanium.

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

SL-EX-02
99711125390
99711125393
99908464901
99711175391
99711175391

The product you are viewing cross references to these numbers
Special Offer
SL-EX-03
Product Information
Product Information
Titanium exhaust tip titanium nut and bolt fastening kit.

Fits

Porsche 997 GT3
Porsche 997 GT3 RS
Porsche 991 GT3
Porsche 991 GT3 RS

Titanium exhaust fastener kit for Porsche 911 GT3/GT3RS style exhaust tips.

The kit includes 3x titanium flange nuts, 3 correct washers (two off-centered, and a standard washer) and 3 x bolts to install the exhaust tips when using a center muffler bypass exhaust. Bolts are raw titanium.

Lighter than steel, they will not corrode and look good indefinitely.

The black nuts and washers are black titanium nitride coated, the silver, raw titanium.

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

SL-EX-03
99711125390
99711125393
99908464901
99711175391
99711175391

The product you are viewing cross references to these numbers
DISPLAYING 17 to 28 (of 28 products)
1 2
Also found on these pages
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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