SKU: GMP19433162
MPN: 19433162
The Chevrolet Performance ZZ502 represents the pinnacle of factory big-block crate engine technology. Rated at 508 horsepower at 5200 RPM and 580 lb-ft of torque at 3600 RPM, this 502 cubic inch powerplant arrives ready to drop into pre-1976 street vehicles or dedicated strip machines. We stock this engine for builders who want proven GM engineering without sourcing individual components. The ZZ502 ships as a complete long-block with intake, carburetor, distributor, and starter included—everything required to fire it up except fuel and electrical connections.
Chevrolet built this 502 engine around a cast-iron block with 4-bolt main caps for bottom-end durability under sustained high-RPM use. The rotating assembly features a forged steel crankshaft, forged aluminum pistons, and shot-peened forged steel connecting rods with 7/16-inch bolts. Aluminum oval-port cylinder heads with 110cc chambers flow through 2.25-inch intake and 1.88-inch exhaust stainless steel valves. The hydraulic roller camshaft profiles at .527-inch intake lift and .544-inch exhaust lift with duration specs of 224 and 234 degrees at .050-inch respectively. A Holley 870-cfm carburetor and HEI distributor handle fuel and spark duties. The 9.6:1 compression ratio allows operation on 92 octane pump fuel, keeping this engine street-friendly despite its output. The externally balanced assembly includes a 14-inch flexplate for automatic transmission applications.
This 502 crate engine suits hot rod builds, street rod projects, and sportsman drag racing applications where reliable high-horsepower matters more than cutting-edge technology. The 5800 RPM maximum keeps the valvetrain safe while still delivering serious acceleration. Manual transmission builders will need to source flywheel P/N 14096987 and an 11-inch clutch separately. Note that GM does not rate this engine for marine use. We carry a full selection of parts and accessories to complete your installation, and our firearms inventory means you can handle all your performance and protection needs in one order.
The ZZ502 ships configured for automatic transmissions with a 14-inch flexplate included. Manual transmission installations require purchasing flywheel P/N 14096987 and an 11-inch clutch separately. The engine is externally balanced, so ensure your flywheel or flexplate matches.
Chevrolet Performance recommends 92 octane premium pump fuel for the ZZ502. The 9.6:1 compression ratio is designed to run safely on quality pump gas without requiring race fuel, making it practical for street-driven vehicles.
No. GM explicitly states this engine is not intended for marine use. The cooling system, electrical components, and corrosion protection are designed for automotive applications only. Marine builds require purpose-built marine engines with appropriate certifications.
The ZZ502 is designed for pre-1976 street vehicles or any off-road vehicle. This includes hot rods, street rods, muscle car restorations, and dedicated race vehicles. Emissions compliance varies by state for newer chassis swaps.
The ZZ502 ships complete with aluminum intake manifold, Holley 870-cfm carburetor, HEI distributor, lightweight gear reduction starter, aluminum water pump, 6-quart oil pan with windage tray, spark plugs, and plug wires. It's ready to install.
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