Exhaust sleeve catalytic converter to u-bend. Porsche Boxster 986  ❭  99611111001

Exhaust sleeve catalytic converter to u-bend.
OE Match exhaust clamping sleeve / exhaust clamp designed to secure and join exhaust components in the Porsche Boxster 986 (1997–2004) exhaust system. It functions as a durable connector between the catalytic converter and U-bend / silencer pipes, helping maintain a tight exhaust joint.
Sold as: Single clamp (two may be required per complete joint).

Fits:
Porsche 986 Boxster 1997 - 2004

Diagram ref no 15

The exhaust clamping sleeve secures two sections of the exhaust - typically where the catalytic converter outlet meets the U-bend or silencer pipe. It ensures a firm, vibration-resistant connection that prevents exhaust leakage, reduces noise, and supports proper exhaust routing. A good clamp helps the exhaust stay aligned under heat expansion and road vibration, reducing stress on nearby hangers and components.

Function:
•  Joins exhaust sections securely (catalytic converter to U-bend/silencer)
•  Prevents exhaust leaks by maintaining a tight pipe connection
•  Absorbs movement and heat expansion without loosening
•  Supports proper alignment of the exhaust system under operating loads.

Without a sound clamp, exhaust joints can leak hot gases, which leads to reduced performance, unwanted noise, and possible component wear.

Exhaust clamps live in a high-heat, corrosive environment, and over time the original sleeve can:
•  Corrode or rust, reducing clamp effectiveness
•  Lose clamping force from heat cycling
•  Allow exhaust leaks at pipe connections
•   Cause excess exhaust noise or vibration.

Replacing worn or damaged clamps with OE Match units helps ensure a tight seal, prevents exhaust gas escape, and protects other exhaust components from undue movement or stress.

When to replace.  Replace this exhaust clamp when:
•  You remove or refit the exhaust system (e.g., catalytic converter or silencer)
•  The existing clamp is corroded, bent, or stretched

•  You notice exhaust leaks, noise, or vibration at the joint
•  Replacement or servicing of exhaust components causes fitment issues

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