This kit is a Grade 8 Stainless Steel ARP (American Racing Products) bellhousing bolt kit for the Mopar Slant 6 engines. Use these to bolt your 727 trans to the engine. These bolts 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. This kit also includes stainless washers.