Cometic Pontiac 326/389/421 V8 .027in MLS Cylinder Head Gasket - 4.300in Bore

This Cometic Multi-Layer Steel (MLS) head gasket uses an advanced HP shim technology. This design increases the clamping force around the combustion chamber, which is especially important for open deck blocks like those found in many Pontiac V8s. The embossed outer layers are coated with Viton, a material known for its resistance to heat and oil, helping to ensure a strong seal under demanding conditions.

Designed with a 4.300-inch bore and a .027-inch thickness, this gasket is built to fit a range of Pontiac V8 engines from the late 1950s through the mid-1960s, including popular models like the Bonneville, Catalina, and GTO. The multi-layer steel construction offers durability and a consistent seal, making it a solid choice for engine rebuilds or repairs on these classic vehicles.