Cometic Pontiac 428/455 V8 .051in MLS Cylinder Head Gasket - 4.380in Bore - No Water Holes

When you're rebuilding the top end of your Pontiac 428 or 455 V8 engine, getting the cylinder head gaskets right is crucial for a solid seal. This Cometic MLS (Multi-Layer Steel) head gasket is built for that job, specifically designed for engines with an open deck block. It features a .051 inch thickness and a 4.380 inch bore, with no water holes, making it suitable for specific performance applications where water passages aren't needed in the gasket itself.

The HP shim technology built into this gasket helps increase the clamping force around the combustion chamber. This is important for ensuring a strong seal, especially with open deck blocks. The outer layers of the gasket are embossed and coated with Viton, a material known for its resistance to heat and oil, helping to maintain sealability under demanding conditions. This well-built gasket is a popular choice for engine rebuilds on a wide range of classic Pontiac, Buick, and Oldsmobile V8s from the late 60s and 70s.