1、Applicable Models: Cylinder head bolts washer kit is mainly designed SBF 260, 289, 302, (LATE 351W) for Windsor Engines (Including 5.0L EFI). 2、Sufficient Quantity: The set includes 12pcs 5/16 x 2in hexagonal head bolts and 12pcs 5/16in washers, accepts 1/4in hex wrench, hex sleeve for installation. 3、Function: Cylinder head bolts with washer is used to install the intake pipe to the engine cylinder, ensuring that the intake pipe is properly and tightly connected to the cylinder without loosening. 4、Stainless Steel Material: This air intake bolt kit is made of stainless steel, with a polished surface and high temperature resistance. It can be used for a long time in a high temperature environment without damage. 5、High Strength: These bolt has been precisely machined and designed to provide excellent strength and mechanical properties, high stability.