SCE Gaskets P690643R Pro Copper Cylinder Head Gasket 4.060 Bore 0.043 Thickness

The SCE Gaskets P690643R Pro Copper cylinder head gasket is engineered for high-performance Small Block Mopar applications requiring superior sealing under extreme conditions. This passenger side gasket features a 4.060-inch bore diameter and 0.043-inch compression thickness, making it ideal for engines with aftermarket pistons or performance builds requiring precise clearance specifications.

Key Features:

• Solid copper construction provides excellent thermal conductivity and conformability to imperfect sealing surfaces
• 4.060-inch bore diameter accommodates stroker and big-bore Small Block Mopar engines
• 0.043-inch compressed thickness allows for precise compression ratio tuning
• Pro Copper design with no composite materials for maximum durability in high-heat, high-pressure applications
• Passenger side (right-hand) configuration for proper engine assembly
• Requires O-ringing or wire ring installation for proper sealing

SCE Pro Copper gaskets are designed for serious performance applications including drag racing, road racing, and boosted engines. The solid copper construction requires smooth, flat deck surfaces (recommended 50 RA or better) and proper installation techniques including the use of copper spray sealant. Sold individually for the passenger side cylinder head.