Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .086in MLS Cylinder Head Gasket - 4.570in Bore

This is a Cometic Multi-Layer Steel (MLS) cylinder head gasket, part number C5433-086. It's designed for Chevrolet Mark-IV and GM Gen-V/VI Big Block V8 engines, featuring a 4.570-inch bore and a compressed thickness of 0.086 inches. This gasket is specifically intended for use with aftermarket cylinder heads, offering undersized water ports that allow for custom porting to match your specific build.

Cometic's MLS gaskets are well-built using multiple layers of stainless steel for strength and corrosion resistance. The outer layers are embossed and coated with Viton, a heat-resistant rubber material that seals effectively against aluminum or cast iron blocks and heads, even with the shearing forces that can occur between different metals. This construction means you don't need additional sealants for a reliable seal, making installation more straightforward. The center layer is stainless steel and can be varied in thickness to meet different engine requirements.

This gasket is a solid option for high-output engines where a dependable seal is critical. It's suitable for applications using Brodix Big Duke or Brodie heads.