Cometic Buick 400/430/455 V8 4.385 inch Bore .027 inch MLS Head Gasket

Starting with a compressed operating thickness of 0.027 inches, this Cometic Multi-Layer Steel (MLS) head gasket is built for serious sealing. It’s designed for Buick 400, 430, and 455 cubic inch V8 engines, featuring a 4.385-inch bore diameter. This gasket fits a wide range of classic Buick models, including the Electra, Riviera, and LeSabre from the late 60s through the mid-70s.

The construction uses multiple layers of stainless steel, which gives it strength and the ability to rebound, helping it resist corrosion and withstand the forces generated between different block and head materials, whether you're pairing aluminum heads with aluminum blocks or cast iron blocks. The outer layers are coated on both sides with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit. This advanced coating ensures a reliable seal even in demanding conditions and means you won't need any additional sealants during installation.