This Genuine GM LS1 Head Gasket 12498544 is sold as a set of two gaskets, specifically designed for servicing one engine. It is important to note that when replacing the head gaskets, the cylinder head bolts must also be replaced. Our store offers Genuine GM cylinder head bolts, which can be found under the part number 12498545 for engines up to 2004 and for engines after 17800568.
