GM Performance 19433162 ZZ502 508 HP Big Block Chevrolet Crate EngineCrate Engine BBC ZZ502 508HP Crate Engine 502 Cubic Inch 508 HP Big Block Chevy The ZZ502 502 is one of the industrys benchmark crate engines, offering excellent value with a proven combination of performance that is suitable for the street or strip. With more than 500 horsepower and 580 lb. ft. of torque, it demands your full attention and a chassis that is strong enough to harness its frame straining twisting power. Thanks to a combination of high