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Exhaust Nuts / Bolts / Studs

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DISPLAYING 17 to 25 (of 25 products)
1 2
Special Order item
9000751480Y
Product Information
Product Information
Hexagon headed heat exchanger bolt to muffler.

porsche

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

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

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Related, superseded, cross reference or alternative numbers for comparison.

9000751480Y
90007514802
9000751480Y
9000751480Y
0057103

The product you are viewing cross references to these numbers
9000751480Y/1
Product Information
Product Information
Hexagon headed heat exchanger bolt to muffler.

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 6

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Related, superseded, cross reference or alternative numbers for comparison.

9000751480Y
90007514802
9000751480Y

The product you are viewing cross references to these numbers
Special Order item
PCG91121100
Product Information
Product Information
Heat exchanger mounting kit.

porsche

Fits:
Porsche 911 1974-84

*If using with 1985 onwards 3.2L you may need 6x 93011119112 42mm bore Manifold gaskets



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Related, superseded, cross reference or alternative numbers for comparison.

PCG91121100
PCG91121100
93011119113
090007606402
99908500102
90007428202
9009100970C
93011119206
91111118903
91111118802
91111118700
90007437801
90007423302
90091009602
93011119307

The product you are viewing cross references to these numbers
PCG91121100/1
Product Information
Product Information
Mounting kit for exhaust.

oematch

Fits:
Porsche 911 2.7L / 3.0L / *3.2L 08/73-07/85
*If used with 1984 onwards 3.2L you may need 6x 93011119112/1 42mm bore Manifold gaskets 

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Related, superseded, cross reference or alternative numbers for comparison.

PCG91121100
PCG91121100
93011119113
99908500102
90007428202
9009100970C
93011119206
91111118903
91111118802
91111118700
90007437801
90007423302
90091009602
93011119307
99908500103

The product you are viewing cross references to these numbers
Special Order item
90007508704
Product Information
Product Information
Hex Head Bolt M8 x 16 used in various locations

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
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
91011KIT
Product Information
Product Information
Mounting kit for heat exchanger.

oematch

Fits:
Porsche 911 E/S (mech. injection) 2.3L-2.7L 08/1971-07/1976
Porsche 911 T (not mech.injection) 2.0L-2.4L 01/1963-07/1973
Porsche 911/911S/911 Carrera 2.7L 08/1973-07/1975

Kit included:
4 gaskets, nuts & bolts

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

91011KIT
91011KIT
91.011KIT

The product you are viewing cross references to these numbers
1621702010
Product Information
Product Information
Mounting kit with 3 straps, 1 gasket, bolts & nuts for rear exhaust.

ssi

Fits:
Porsche 911 Carrera 3.2 08/83-07/89
Porsche 911 SC/911 Carrera 2.7-3.0 08/75-07/83

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

1621702010
90111115704

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 17 to 25 (of 25 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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