This OE quality head bolt set is vehicle specific and a direct replacement for the original components. Cylinder head bolts are responsible for holding the cylinder head to the engine block. On most modern engines, stretch bolts are typically used and must be replaced when the head gasket is changed. Each set includes the needed bolts for one cylinder head and come packaged in a protective cardboard box with assembly lube. Established in 1972, Ajusa is a leading international manufacturer of automotive gaskets/sets, cylinder head bolt sets, and hydraulic lifters. Manufactured in Spain, Ajusa offers the world"s largest range of European and Asian applications and offers excellent coverage for European and Asian vehicles in the U.S. and Canadian marketplace. Ajusa"s extensive OE quality product line coupled with its dedication and proven track record in providing the customer with excellent service is right in line with the CRP Automotive mission and commitment to the marketplace.