COMETIC C9664 Twin Cam Cam Housing Gasket - MLS Multi-Layer Steel for High-Performance Engines

Description

Upgrade your Twin Cam engine's reliability with COMETIC's C9664 cam housing gasket. Engineered for high-performance applications, this MLS gasket delivers exceptional sealing and durability to prevent leaks and maintain peak engine efficiency.

Key Features

  • Multi-Layer Steel (MLS) Construction: Combines full embossed stainless steel outer layers with a flexible graphite core for superior heat resistance and sealing integrity.
  • 0.030" Thickness: Precisely engineered thickness ensures optimal compression and long-term durability under extreme operating conditions.
  • Cam Housing Compatibility: Specifically designed for Twin Cam engines to fit seamlessly and provide reliable performance.
  • Heat-Resistant Design: Advanced materials withstand high temperatures without warping or degradation.

Why Choose This Product

COMETIC's C9664 gasket is trusted by racers and enthusiasts for its unmatched durability and leak-proof performance. The combination of stainless steel layers and graphite core offers exceptional flexibility and resilience, reducing the risk of failure during high-stress engine operation. This gasket is ideal for maintaining OEM-level sealing while extending engine lifespan. Its easy installation and cost-effective performance make it a top choice for both daily drivers and competition vehicles.
SKU: GM5D816B01
MPN: C9664
Category: Gaskets/Seals
Brand: Cometic
Stock: In Stock
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Upgrade your Twin Cam engine's reliability with COMETIC's C9664 cam housing gasket. Engineered for high-performance applications, this MLS gasket delivers exceptional sealing and durability to prevent leaks and maintain peak engine efficiency.

Key Features

  • Multi-Layer Steel (MLS) Construction: Combines full embossed stainless steel outer layers with a flexible graphite core for superior heat resistance and sealing integrity.
  • 0.030" Thickness: Precisely engineered thickness ensures optimal compression and long-term durability under extreme operating conditions.
  • Cam Housing Compatibility: Specifically designed for Twin Cam engines to fit seamlessly and provide reliable performance.
  • Heat-Resistant Design: Advanced materials withstand high temperatures without warping or degradation.

Why Choose This Product

COMETIC's C9664 gasket is trusted by racers and enthusiasts for its unmatched durability and leak-proof performance. The combination of stainless steel layers and graphite core offers exceptional flexibility and resilience, reducing the risk of failure during high-stress engine operation. This gasket is ideal for maintaining OEM-level sealing while extending engine lifespan. Its easy installation and cost-effective performance make it a top choice for both daily drivers and competition vehicles.
SKU GM5D816B01
MPN C9664
Brand Cometic
Category Gaskets/Seals
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Reviews

Make Model Years
Harley-Davidson Twin Cam 88 1999-2006
Harley-Davidson Twin Cam 96/103 2007-2017

Frequently Asked Questions

This is a single cam housing gasket (C9664). Cometic offers full kits separately.

Yes, compatible with stock and most aftermarket Twin Cam cams as long as bore doesn't exceed specs.

0.030" for stock compression; 0.040" for higher compression builds to prevent blow-by.

Yes, fits 2001-2017 Twin Cam models including EFI.

Installation Guide

Difficulty Medium
Est. Time 45 min

Tools Required

  • torque wrench
  • socket set
  • gasket scraper
  • RTV sealant

Pro Tips

  • Apply thin layer of RTV to corners, torque in crisscross pattern to spec (15-20 ft-lbs)

Common Mistakes to Avoid

  • Not cleaning surfaces thoroughly
  • Incorrect torque sequence

Comparison vs Stock/OEM

MLS construction vs. OEM composite/paper; superior sealing under high heat/pressure

Improvements

  • Better resistance to blow-by
  • Handles higher compression
  • Longer service life

Considerations

  • Slightly thicker may require head/case milling for perfect fit

Durability & Warranty

Expected Lifespan 50,000+ miles with proper torque
Warranty 1 year limited manufacturer warranty
Maintenance Re-torque after 500 miles; inspect during valve checks

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