Cometic C4139-043 Coventry Climax FWB/FWE Cylinder Head Gasket 78mm Bore .043" CFM-20

The Cometic C4139-043 is a precision-engineered cylinder head gasket designed specifically for Coventry Climax FWB and FWE engines found in classic racing and sports cars. This gasket features a 78mm bore size with a compressed thickness of .043 inches, making it ideal for 1.2L and 1.5L applications.

CFM-20 Construction:

Cometic CFM-20 gaskets utilize a perforated-galvanized steel core with an asbestos-free fiber material applied to both sides. The perforated steel core with elastomer surface allows heat to be drawn evenly across the gasket surface while providing maximum sealing characteristics when exposed to coolants and oils. This construction provides excellent conformability to head and block surfaces while maintaining reliable sealing under high-performance conditions.

Key Specifications:

• Material: CFM-20 fiber reinforced gasket material
• Compressed Thickness: .043 inches
• Bore Size: 78mm round
• Single layer construction
• Asbestos-free composition
• UPC: 191070022501

Engineered for vintage motorsports and restoration applications, this gasket delivers the precision fitment and durability expected from Cometic's high-performance gasket solutions. The CFM-20 material provides superior heat distribution and sealing performance for demanding racing and street applications alike.