Cometic C4145-063 BMC A-Series Copper Head Gasket - 948/1098 67.5mm

The Cometic Gaskets C4145-063 is a precision-engineered copper cylinder head gasket designed specifically for BMC 948cc and 1098cc A-Series engines. This gasket features a 67.5mm bore diameter and a compressed thickness of .063 inches, making it ideal for performance applications and engine rebuilds requiring exact compression control.

Key Features:

• Premium solid copper construction for superior heat dissipation and conformability
• 67.5mm bore diameter optimized for BMC A-Series small-bore applications
• .063" (1.6mm) compressed thickness for precise compression ratio tuning
• Embossed design ensures positive sealing around combustion chambers and fluid passages
• Reusable construction allows for multiple installations when properly maintained
• Compatible with BMC 948cc and 1098cc A-Series engines found in classic Mini, Austin-Healey Sprite, MG Midget, and other British classics

Cometic copper head gaskets are a preferred choice for vintage British engine builds due to their ability to handle thermal expansion, provide consistent clamping force, and accommodate minor surface imperfections. The embossed bead design creates a reliable seal without requiring additional sealants in most applications. Proper surface preparation and torque specifications are essential for optimal performance.