This listing is for a set of (8) Pistons and matching Ring set for a Chevrolet 454 V-8 - 4.280" bore (at +.030") Domed head .095" high. DurOshield skirt coated piston. Special Hi-performance.1971 Car 454-LS6 (USA); open chamber heads. 5/64" 5/64" 3/16" ring grooves Pin diameter: .989" (included). Stock 6.135" length rods Press-fit or floating Stock 4.000"" stroke