Fitment:Rear Mail Seal Gasket compatible with 4.8L 5.3L 5.7L 6.0L 6.2L GM Vortec engine, including Compatible with Chevrolet Silverado Suburban Tahoe Avalanche Colorado Camaro Express Trailblazer Caprice Impala GMC Sierra Yukon Savana Envoy Canyon Cadillac Escalade Buick Rainier model year 1999-2020.
OEM/Replacement Part Number: BS40640
Features:Head Gasket prevents liquids and gases from escaping into adjacent cylinders and the surrounding oil and coolant galleries. The purpose is to seal the cylinders to ensure maximum compression and avoid leakage of coolant or engine oil into the cylinders. They are designed without a metal core, to allow engine builders to trim the gasket for exact fit on modified ports.
Intention:Head Gasket systems can withstand high pressures, high temperatures and aggressive media of a car. Cylinder head gaskets also act as a force transmission element