Add some horsepower and maybe an aggressive cam, and you are really asking for problems. This complete engine mount set includes CNC machined, 6061 anodized mounts, mated to nickel plated engine brackets via replaceable, polyurethane bushings.Stainless Steel positioning pins, and grade 10.9 hardware are included. This is a direct fit application on all C5 & C6 Corvette models. Upgrade your Corvette today and see how much performance you were missing. Upgrades Soft Factory Engine Mounts. CNC Machined Anodized Aluminum Mounts. Nickel Plated Engine Bracket and Hardware. WARNING : This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer.