Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .045in MLS Cylinder Head Gasket - 4.310in Bore

If you're working on a Chevrolet Mark-IV or GM Gen-V/VI Big Block V8 engine, this Cometic Multi-Layer Steel (MLS) cylinder head gasket is a solid option. It's designed with a 4.310-inch bore and a compressed thickness of 0.045 inches, making it suitable for a wide range of applications, including those using aftermarket heads like Brodix Big Duke or Brodie Heads. This gasket fits many vehicles from the mid-60s through the early 90s, such as the Chevrolet Impala, C10 Pickup, and Corvette.

What makes this gasket stand out is its construction. It's built from multiple layers of stainless steel, which gives it increased strength and the ability to rebound, helping it resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and varying surface finishes, ensuring a reliable seal without needing additional sealants. The center layer is uncoated stainless steel, allowing for precise thickness adjustments to meet specific engine build needs. These gaskets are also designed to handle the shearing forces that can occur between aluminum heads and cast iron blocks, or between two aluminum components.

Because these are designed for aftermarket heads, they feature undersized water ports. This gives you the flexibility to customize the water passages to match your specific setup. This gasket is a well-built choice for anyone looking for a dependable seal on their high-output Big Block V8.