These are the correct thickness LSA Head Gaskets, will suit other 6.0L and 6.2L engines that require a higher compressed thickness head gasket. Boosted or very high compression engines.
Installed Thickness: 1.35mm; Diameter: 104mm; w/ OEM # 12622033
Comes in a pair.Head Gasket Only ACDelco GM Original Equipment Engine Cylinder Head Gasket is a GM-recommended replacement component for one or more of the following vehicle systems: engine - mechanical. This original equipment gasket will provide the same performance, durability, and service life you expect from General Motors.

Features & Benefits:
GM-recommended replacement part for your GM vehicle's original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function