COMETIC C9147 Twin Cam EST Gasket Kit - MLS Head Gasket Kit for Enhanced Sealing Technology

Description

Upgrade your Twin Cam engine's sealing integrity with COMETIC's C9147 EST Gasket Kit. This full gasket solution combines advanced materials and Enhanced Sealing Technology to deliver unmatched durability and performance for high-output powerplants.

Key Features

  • Multi-Layer Steel (MLS) Head Gaskets: Constructed from high-strength MLS materials for superior sealing under extreme temperatures and pressures.
  • Permatorque Silicone Gaskets: Provides flexible sealing for oil and coolant passages while resisting degradation from engine fluids.
  • Brass Ring Carrier: Ensures precise alignment and long-lasting performance in critical sealing applications.
  • 0.040 in. Thickness: Standard bore thickness for easy installation and compatibility with existing engine components.
  • 4.000 in. Bore Size: Precision-engineered for Twin Cam engines requiring exact fitment and performance optimization.

Why Choose This Product

Engineers and riders rely on COMETIC's EST technology to prevent leaks, reduce maintenance, and maximize engine efficiency. This comprehensive gasket kit is specifically designed for Twin Cam engines, offering reliable sealing for high-performance applications. The combination of MLS, silicone, and brass components ensures long-term durability while maintaining engine integrity under demanding conditions. Whether you're modifying your powerplant or maintaining factory specifications, this kit provides the sealing reliability needed for consistent performance and peace of mind.

SKU: GM4A39ACAF
MPN: C9147
Category: Gaskets/Seals
Brand: Cometic
Stock: In Stock
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Upgrade your Twin Cam engine's sealing integrity with COMETIC's C9147 EST Gasket Kit. This full gasket solution combines advanced materials and Enhanced Sealing Technology to deliver unmatched durability and performance for high-output powerplants.

Key Features

  • Multi-Layer Steel (MLS) Head Gaskets: Constructed from high-strength MLS materials for superior sealing under extreme temperatures and pressures.
  • Permatorque Silicone Gaskets: Provides flexible sealing for oil and coolant passages while resisting degradation from engine fluids.
  • Brass Ring Carrier: Ensures precise alignment and long-lasting performance in critical sealing applications.
  • 0.040 in. Thickness: Standard bore thickness for easy installation and compatibility with existing engine components.
  • 4.000 in. Bore Size: Precision-engineered for Twin Cam engines requiring exact fitment and performance optimization.

Why Choose This Product

Engineers and riders rely on COMETIC's EST technology to prevent leaks, reduce maintenance, and maximize engine efficiency. This comprehensive gasket kit is specifically designed for Twin Cam engines, offering reliable sealing for high-performance applications. The combination of MLS, silicone, and brass components ensures long-term durability while maintaining engine integrity under demanding conditions. Whether you're modifying your powerplant or maintaining factory specifications, this kit provides the sealing reliability needed for consistent performance and peace of mind.

SKU GM4A39ACAF
MPN C9147
Brand Cometic
Category Gaskets/Seals
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Reviews

Make Model Years
Harley-Davidson Twin Cam 96/103 Dyna, Softail, Touring 2007-2017
Harley-Davidson FLH, FLT, FXD, FXST 2007-2017

Frequently Asked Questions

Designed for 4.000" standard bore Twin Cam engines. Available in other thicknesses/bore sizes.

Yes, complete kit includes MLS head gaskets, base gaskets, exhaust gaskets, and all necessary seals.

Yes, MLS construction handles high compression well. Verify thickness matches your build.

C9147 is for stock 4.000" bore. Cometic offers kits for 4.060", 4.125" etc.

Installation Guide

Difficulty Medium
Est. Time 2 hr 0 min

Tools Required

  • torque wrench
  • socket set
  • gasket scraper
  • engine stand or hoist
  • feeler gauges

Pro Tips

  • Clean all mating surfaces meticulously
  • Follow Harley torque specs exactly
  • Use assembly lube on bearings
  • Check piston-to-valve clearance after install

Common Mistakes to Avoid

  • Not cleaning surfaces thoroughly
  • Incorrect torque sequence
  • Over-torquing head bolts

Comparison vs Stock/OEM

Replaces paper/composition stock gaskets with multi-layer steel construction

Improvements

  • Superior sealing under high heat/pressure
  • Better durability
  • Handles higher compression
  • Repeated reuse possible

Considerations

  • Higher cost
  • Requires precise installation

Durability & Warranty

Expected Lifespan Engine rebuild lifespan (50,000+ miles with proper install)
Warranty 1 year manufacturer defect warranty
Maintenance Inspect during valve adjustments; reusable if undamaged

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