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Your Vehicle  //  Porsche  //  996 (911) (1997-2005)  //  996 GT2 2001-05

Exhaust Nuts / Bolts / Studs

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DISPLAYING 1 to 7 (of 7 products)
MANIFOLDKIT996TT
Product Information
Product Information
Exhaust manifold fitting kit.

Contains manifold to head studs, gaskets and manifold to turbo gasket and lock nuts.
Bolts and nuts are made out of Titanium. Gaskets are OEM.

Fits:
Porsche 996 Turbo 2001-2005

SR067
Product Information
Product Information
Exhaust bolt repair kit for Boxster / 996 / 997 Carrera & Cayman Gen1 1997- 2009 (Not GT3, GT2 or TT engines)

With more and more broken exhaust bolts reported on the water-cooled engines, the headache of repairing a broken bolt is becoming epidemic. Tasks ranging from a simple exhaust system update through an engine removal, are consistently plagued by snapped, rusted, and broken exhaust manifold bolts. Rarely can an accurate removal of the broken bolt be performed with the engine in the car, and even after removal, the task is time consuming and if not done carefully can lead to a damaged head or faulty repair. STOMSKI RACING's answer to these problems is the SR067, a kit that easily, accurately, and flexibly allows you to drill out the broken bolts - with the engine still in the car- saving time and headaches. A CNC milled plate indexes precisely off the broken bolts and/or bolt holes. Using our uniquely designed Thumb Screws, the SR067 plate is locked in place (by threading a Thumb Screw over a broken bolt or by using a supplied bolt threaded through the SR067 Thumb Screw). With the included pilot drills and drill guides, the faulty bolt can be drilled out, producing a perfectly perpendicular and centered hole that if necessary can be chased with an included M8x1.25 tap.

Kit includes : anodized aluminum fixture, drill bits, tap with extension, drill jigs/guides, Thumb Screws, and hardware in a sturdy storage case.

Now also includes our SR065D drill guide.
Ten Percent Off
TITANSTUDS18
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. 

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

Contains 18 x Studs (38mm), 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.

TITANSTUDS18
90037813100
90037822709
99907507400
90037822701
99907353501
99907507400
99907353501
99907507400

The product you are viewing cross references to these numbers
Ten Percent Off
TITANTORXLONG18
Product Information
Product Information
Titanium exhaust manifold bolts M8x27. Torx head.
Pack of 18 pcs.

Fits:
Porsche 996 Turbo / GT2 / GT3 1999-2005
Porsche 997.1 Turbo / GT2 / GT3 2007-2009
Porsche 997.2 Turbo / GT2 RS / GT3 2010-2013

Porsche 991 Turbo / Turbo S / GT2RS  2014-2020

Titanium is a highly corrosion-resistant material, which is particularly important in exhaust systems due to the exposure to extreme heat and moisture. The corrosion resistance of titanium bolts ensures longevity and reduces the risk of premature failure, ultimately saving the owner from costly repairs.

Click 'Zoom in' for large parts diagram.
Diagram ref no 9



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

TITANTORXLONG18
99907358901
90037822701
90037813100

The product you are viewing cross references to these numbers
Special Order item
99611121270
Product Information
Product Information

This Porsche hexagon-head bolt secures connected components within the specified exhaust system assemblies. It is used in the exhaust assembly context that includes heat protection on the applications listed below.

Fits:

  • Porsche 997.1 Turbo / GT2, M97.70, 2007–09
  • Porsche 997.1 GT2 RS, M97.70, 2011
  • Porsche 996 TURBO 2000–05 (996 (911) (1997–2005))
  • Porsche 996 GT2 2001–05 (996 (911) (1997–2005))



Check fitment for your specific vehicle (model, year, engine) before ordering.


Required Quantity
Two bolts are specified for each applicable 996 Turbo or 997.1 Turbo/GT2/GT2 RS exhaust system assembly.


What Is This Part?
This is a threaded fixing with an external hexagonal head, allowing it to be tightened and removed with a suitable spanner or socket. It forms part of the exhaust system fastening arrangement and holds the connected parts in their intended position. The surrounding assembly includes exhaust components, supports and heat protection, so identifying the correct fixing position matters when replacing hardware. Match the part number to the intended application rather than selecting a bolt solely because its head looks similar.


What Does This Part Do?

  • Secures connected parts: Provides the threaded fastening needed at its specified exhaust assembly position.
  • Maintains seating: Holds the attached components together when correctly installed and tightened.
  • Allows tool access: The hexagonal head provides a drive surface for fitting and removal.


Why Replace This Part?
Exhaust hardware can become corroded or seized after exposure to moisture and repeated heating and cooling. Damaged threads, a rounded head or a broken bolt can prevent the fixing from being removed, seated or tightened correctly. Replace an affected bolt when inspection shows that it is no longer serviceable.

During exhaust removal or refitting, inspect the mating threads and attached components as well as the bolt. A replacement fixing will not correct a damaged mounting point or poor alignment. Follow the applicable workshop instructions for tightening torque, thread preparation and any renewal requirements.


When to Replace This Part?

  • Significant corrosion: Rust or pitting has damaged the head, shank or threads.
  • Damaged drive head: A suitable tool can no longer grip the hexagon properly.
  • Thread damage: Threads are stripped, crossed or otherwise unsuitable for refitting.
  • Breakage or distortion: The bolt is snapped, bent or visibly damaged.
  • Missing or loose fixing: Inspect the complete connection and replace defective hardware after establishing the cause.


Where Is This Part Fitted?
Location: Within the exhaust system assembly on the listed applications, including the assembly with heat protection on the specified 997.1 models. Confirm the exact fastening position for the vehicle before dismantling or ordering.


Product Summary

  • Product: Hexagon-head exhaust assembly bolt.
  • Brand: Porsche.
  • Part number: 99611121270.
  • Purpose: Secures connected components at its specified exhaust assembly position.


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

99611121270
99611121270

The product you are viewing cross references to these numbers
Special Order item
90011900100
Product Information
Product Information
Pan head screw 5 x 12mm. 

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

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



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

90011900100
90011900100

The product you are viewing cross references to these numbers
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.

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
DISPLAYING 1 to 7 (of 7 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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