This kit is a Grade 8 Stainless Steel ARP (American Racing Products) bellhousing bolt kit for the Ford Small Block 289 302 351W using a stick/manual transmission with a 4- 1 1/2″ & 2- 2″ long bolts. They are not only good looking, and don’t rust, but they are super strong for your high horsepower needs and have a polished finish. These bolts have a tensile strength of 170,000 psi. They have a 1/2 inch 6 point head and a .750 diameter flange for easier access in the tight spots. This kit also includes extra thick heavy duty stainless washers.