Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .030in MLS Cylinder Head Gasket - 4.310in Bore

When you're rebuilding the top end of your Chevrolet Mark-IV or GM Gen-V/VI Big Block V8, you need a head gasket that can handle the pressure. This Cometic Multi-Layer Steel (MLS) head gasket is built for high-output engines and comes with a .030 inch compressed thickness and a 4.310 inch bore. It's designed to provide a solid seal without needing any extra sealants, making the installation process more straightforward.

This gasket is constructed from multiple layers of stainless steel, which gives it increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes. The center layer is also stainless steel and can be adjusted to meet different thickness requirements. This design is suitable for pairing aluminum heads with aluminum blocks or aluminum heads with cast iron blocks, as it can manage the shearing forces that can occur between different metals.

This gasket is specifically noted for its undersized water ports, which allow for customization when used with aftermarket heads. It's a well-built option for those looking for reliable sealing performance in demanding applications.