Exhaust manifold-to-catalytic-converter bolt, Stainless steel. Porsche 986 Boxster / 996 M8 x 40  ›  90007428702

OE Match stainless steel bolt for the exhaust manifold-to-catalytic-converter connection, supplied individually; check the dimensional note below before selecting replacement hardware.

Fits

Porsche 986 Boxster 1997-05
Porsche 996 C2 / C4 / C4S 1997-05
Porsche 996 GT3 1999-05

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

What This Product Does

This fastener joins the relevant exhaust flange components. Working with the specified mating hardware and seal, it provides the clamping needed to hold the connection together.

Functions

• Fastens the manifold-to-catalyst joint.
• Helps retain flange alignment during assembly.
• Replaces damaged or missing exhaust-joint hardware.
  
  

Technical Details

• Reference: 90007428702; brand: OE Match; material: stainless steel.
• Product specification: M8 x 40. EACH
  
  

Symptoms of Fault

Broken fixings, damaged threads, recurrent loosening or flanges that do not close evenly warrant inspection. Ticking, rattling or soot around the connection may indicate leakage, although the gasket and flange surfaces also need checking.

Why Replacement Matters

Seized or damaged hardware can complicate dismantling and prevent correct reassembly. Renewing unsuitable fixings supports even joint clamping; inspect adjoining nuts, seals and mounting components rather than assuming the bolt alone will resolve a leak.

FAQs

Should other hardware be checked?
Inspect the mating nuts, gasket, flange faces and nearby supports during the repair.

Should anti-seize be applied?
Follow the applicable fitting procedure and torque specification; do not assume lubricated and dry tightening requirements are interchangeable.

Which length should I select?
The product specification and diagram reference differ. Confirm the fixing position and required dimensions before fitting.