Cometic C8439 Copper Head Gasket Bore Thick - 85mm 043 1498cc

The Cometic C8439 is a high-performance copper cylinder head gasket engineered for extreme sealing applications. Designed for engines with an 85mm bore and 1498cc displacement, this gasket features .043" compressed thickness for precise compression ratio control.

Key Features:

• Constructed from 99.9% pure oxygen-free C110 copper for superior thermal conductivity and ductility
• 85mm bore diameter optimized for 1498cc engine applications
• .043" (1.09mm) compressed thickness allows for precise deck height and compression adjustments
• Excellent for high-boost, nitrous, and extreme compression applications
• Superior conformability to deck surface irregularities compared to multi-layer steel gaskets
• O-ringing is recommended for maximum sealing performance

Cometic copper gaskets are ideal for race engines and high-performance street builds where maximum combustion sealing is critical. The malleable nature of pure copper allows these gaskets to conform to surface imperfections while maintaining excellent thermal transfer properties. Requires smooth, flat deck surfaces (50 RA or finer) for proper sealing.