Hypereutectic Coated Skirt 22cc Dome Pistons compatible with Chevrolet Chevy BB 454 7.4 7.4L. Set of 8. Bore: 4.310" (at +.060")" If you're looking for pistons with an unbeatable combination of performance and value, then Speed-Pro hypereutectic pistons are for you. Bore: 4.310" (at +.060")