ARP 134-5502 Main Studs Kit for 1992-1997 Chevrolet LT1 Engine with Factory Windage Tray and 2 Bolt MainsMain Bolt Style: 2 bolt Fastener Style: Stud Fastener Nut Style: Standard hex Works with Windage Tray: Yes Fastener Yield Strength (psi): 200,000 psi Nuts Included: Yes Washers Included: Yes These ARP main studs are made from 8740 chromoly steel and have a 190,000 psi tensile strength rating. They are precision centerless ground and thread rolled to Mil S 8879 specs, with a black oxide finish for corrosion resistance. The kits come complete with