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Porsche > Boxster 986/987/981 (1997-2016) > Boxster 986 2.5L 1997-99 > Exhausts >

Exhaust Fitting Kits

Exhaust Fitting Kits

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DISPLAYING 1 to 4 (of 4 products)
Mounting Kit for Rear Exhaust Porsche 986 Boxster - 99611111001, 99611120900, 99611331101, 90038000501 - 94.210KIT, 94210KIT
1
Mounting Kit for Rear Exhaust Porsche 986 Boxster
EXHFITTING.986.1.1
Product Information
Product Information
Mounting Kit for Rear Exhaust.

oematch

Fits:
Porsche Boxster 2.5L-3.4L 09/1996>>

Kit included:
2x Pipe Connector, 45x49.5x75mm, stainless steel
2x Clamp
2x Retaining plate, 5.0mm
4x Lock nut, M8x1.25mm

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Related, superseded, cross reference or alternative numbers for comparison.

EXHFITTING.986.1.1
99611111001
99611120900
99611331101
90038000501

The product you are viewing cross references to these numbers
Mounting with Titanium clamps for Rear Exhaust Porsche 986 Boxster - 99611111001, 99611120900, 99611331101, 90038000501 - 94.210KIT, 94210KIT
1
Mounting with Titanium clamps for Rear Exhaust Porsche 986 Boxster
EXHFITTING.986.1.1T
Product Information
Product Information
Mounting with Titanium clamps for Rear Exhaust


oematch

Fits:
Porsche Boxster 986 2.5L 1997-99
Porsche Boxster 986 2.7L 1999-02
Porsche Boxster S 986 3.2L 1999-02
Porsche Boxster 986 2.7L 2003-04
Porsche Boxster S 986 3.2L 2003-04


Kit included:
2x Pipe Connector, 45x49.5x75mm,  Titanium
2x Clamp  Titanium
2x Retaining plate, 5.0mm
4x Lock nut, M8x1.25mm



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Related, superseded, cross reference or alternative numbers for comparison.

EXHFITTING.986.1.1T
99611111001
99611120900
99611331101
90038000501

The product you are viewing cross references to these numbers
Exhaust head bolt repair kit for Porsche Boxster / 996 / 997 - SR067
2
Exhaust head bolt repair kit for Porsche Boxster / 996 / 997
SR067
Product Information
Product Information
Exhaust bolt repair kit for Boxster / 996 / 997 Carrera & Cayman Gen1 1997- 2009 (Not GT3, GT2 or TT engines)

stomski

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.
Mounting Kit for Catalytic Converter. Porsche 986 Boxster 2.5L - 94.260KIT, 1621700910
2
Mounting Kit for Catalytic Converter. Porsche 986 Boxster 2.5L
94260KIT
Product Information
Product Information
Mounting Kit for Catalytic Converter. 
The Mounting Kit for Catalytic Converter is an OE Match exhaust hardware kit designed as a direct-fit solution for supporting and securing the catalytic converter on the Porsche Boxster 986 2.5L. It includes all the essential clamps, connectors, gaskets, and fasteners needed to install or re-secure the catalytic converter/pipe assembly to the exhaust system.

Fits:
Porsche 986 Boxster 2.5L 10/1996>>

Kit included:
2x Pipe Connector, 45x49.5x75mm, stainless steel
2x Retaining plate, 5.0mm
2x Gasket
6x Bolt, M8x1.25x40mm
4x Lock nut, M8x1.25mm
6x Nut, M8x1.25

The kit is designed specifically for the Porsche Boxster 986 2.5L (1997–1999) exhaust layout and provides a complete set of hardware to replace worn, missing, or corroded mounting parts during exhaust work. Whether fitting a new catalytic converter or refreshing an existing exhaust installation, this kit ensures secure joints and proper alignment, helping prevent exhaust leaks and noise while maintaining correct exhaust flow.

This mounting kit supplies the hardware and seals needed to securely fasten the catalytic converter to the adjoining exhaust pipes. It ensures proper alignment, leak-free joints, and vibration-resistant connections, which are essential for efficient exhaust flow and emissions performance.

Function:
• Provides secure mounting for the catalytic converter and exhaust piping
•  Includes connectors, plates, gaskets, nuts, bolts, and lock nuts
•  Helps prevent exhaust leaks and reduces noise
•  Supports proper alignment and vibration resistance
•  design for direct, no-modification installation

The exhaust mounting hardware on older vehicles can suffer from corrosion, wear, or loosening due to repeated heat cycling and road conditions. Loose or deteriorated mounting parts can lead to exhaust leaks, noise, reduced performance, or even damage to catalytic converters and adjacent components. Replacing them with an OE Match mounting kit restores secure, leak-free connections and maintains the integrity of the catalytic converter and wider exhaust system.

When to replace:
•  During catalytic converter or exhaust system replacement
•  Hardware shows corrosion or stripped threads
•  Noticeable exhaust leaks or rattles under acceleration
•  After vibration or loosening of exhaust joints
•  Routine service or restoration work
DISPLAYING 1 to 4 (of 4 products)
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About Exhaust Fitting Kits

Exhaust Fitting Kits for Porsche | Complete Installation & Repair Solutions

The exhaust fitting kit is an essential component of any exhaust installation, replacement, or upgrade. It ensures that all joints, clamps, seals, and brackets in your Porsche’s exhaust system are correctly aligned and securely fastened, preventing leaks and maintaining proper exhaust flow.

At Design911, we supply a wide range of exhaust fitting kits designed to match Porsche exhaust systems with manufacturer-level accuracy. Each kit includes high-quality gaskets, clamps, bolts, nuts, seals, and mounting hardware, ensuring a professional, leak-free fit — whether you’re restoring a classic 911 or maintaining a modern performance model.

Our fitting kits are manufactured to exact tolerances from corrosion-resistant materials, guaranteeing a long-lasting seal and reliable performance under high-temperature, high-pressure conditions.

What Do Exhaust Fitting Kits Do?

An exhaust fitting kit provides the components required to properly install, secure, or replace sections of your Porsche’s exhaust system. These parts ensure stability, prevent vibration, and maintain airtight joints for optimum exhaust efficiency.

Core Functions:

  • Seals exhaust joints to prevent gas leaks and noise.
  • Secures exhaust components such as pipes, silencers, and catalytic converters.
  • Reduces vibration and movement caused by engine motion.
  • Ensures proper exhaust alignment for optimal flow and pressure balance.
  • Maintains performance and compliance with emissions standards.

Using a dedicated Porsche exhaust fitting kit ensures your system functions exactly as intended — improving both performance and reliability.

Why Do Exhaust Fitting Components Fail?

Due to constant exposure to heat, vibration, and corrosive exhaust gases, fitting components are prone to wear over time.

Common Causes of Failure Include:

  • Rust and corrosion from road salt or moisture.
  • Thermal fatigue from repeated heating and cooling cycles.
  • Loose fittings causing leaks or rattles.
  • Worn seals or gaskets leading to reduced exhaust pressure.
  • Cracked or weakened clamps and bolts from prolonged vibration.

A failing fitting kit can lead to loud exhaust noise, loss of performance, emission leaks, or even component misalignment. Replacing these parts is essential for safety, efficiency, and sound quality.

Why Replace or Upgrade Your Exhaust Fitting Kit?

Replacing old or damaged fitting components with precision-engineered replacements ensures your Porsche’s exhaust system performs at its best.

Key Benefits:

  • Restores proper exhaust sealing and flow.
  • Reduces exhaust leaks and unwanted noise.
  • Improves durability and vibration resistance.
  • Crafted from high-grade stainless steel and heat-resistant materials.
  • Compatible with standard and performance exhaust systems.
  • Direct-fit design for Porsche 911, Cayman, Boxster, Panamera, Macan and more.

Whether installing a new exhaust system or carrying out maintenance, using a complete fitting kit guarantees a professional finish and long-lasting results.

Highlights:

  • Complete exhaust fitting kits for Porsche models.
  • Includes clamps, bolts, gaskets, and seals for perfect alignment.
  • Designed for precision fitment and long-term reliability.
  • Prevents leaks and optimises exhaust pressure balance.
  • Ideal for exhaust upgrades, repairs, and restorations.
  • Manufactured from corrosion- and heat-resistant materials.

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