Description: This engine comes fully assembled from carburetor to oil pan and brings you as close to a custom-built 502 race engine as you can get while still paying crate engine prices. The big block delivers 502 horses at 5200 rpm and 567 ft.-lbs. of torque at 4200 rpm with a 9.6:1 compression ratio and maximum recommended rpm of 5800. The(more)

Description: This engine comes fully assembled from carburetor to oil pan and brings you as close to a custom-built 502 race engine as you can get while still paying crate engine prices. The big block delivers 502 horses at 5200 rpm and 567 ft.-lbs. of torque at 4200 rpm with a 9.6:1 compression ratio and maximum recommended rpm of 5800. The cast iron four-bolt main block is loaded with the following components made by GM Performance Parts unless otherwise noted: a forged steel crankshaft and shot-peened connecting rods with 7/16 in. bolts forged aluminum pistons a hydraulic roller cam (.527 in. intake/.544 in. exhaust lift and 224 degrees intake/234 degrees exhaust duration at .050 in.) a single roller timing chain aluminum oval port cylinder heads with 110cc combustion chambers stainless steel 2.25 in. intake/1.88 in. exhaust valves stamped steel 1.7:1 rocker arms a CNC port matched dual plane aluminum intake manifold a Holley 850 cfm vacuum secondary carburetor an HEI distributor a high torque starter an aluminum short-style water pump #4 Rapid Fire spark plugs high performance spark plug wires with looms and a dyno-tuned induction and ignition system. With features like this its no wonder the ZZ502 is known as the King of all Crate Engines.(minimize)