Here at last is the king of all big block crate engines from GM Performance. These 502 cubic inch engines come fully assembled and are rated at approximately 9.6:1 compression with 502 hp at 5,200 rpm and 567 ft./lbs. of torque at 4,200 rpm. These complete engine kits make extensive use of aluminum to keep weight down. Including aluminum heads, intake, water pump, and valve covers. Additionally, these engines are full of heavy duty parts including, forged aluminum pistons, forged shot peened steel connecting rods with 7/16 in. bolts, forged steel crankshaft, 14 in.