Stage 8 (8914C) 1.50" Thread Pitch Bolt Kit for Ford Coyote 5.0 Grade 8 bolts will not stretch when hot Duplex nickel finish for a superior look and corrosion resistance Double Hex Head includes 3/16 inch recessed Allen Head for easy installation Removable and reusable Can visually inspect - no need to put a wrench on to check tightness