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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 17 to 18 (of 18 products)
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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Related, superseded, cross reference or alternative numbers for comparison.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Related, superseded, cross reference or alternative numbers for comparison.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 18 (of 18 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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