This is a brand new ZZ502/502 Deluxe crate engine complete from carburetor to oil pan. It comes completely assembled from the factory and includes the following. Holley 850-cfm four-barrel carburetor, dual-plane intake manifold CNC-port matched to the oval-port heads, starter, distributor, plug wires, and water pump. The ZZ502/502 Deluxe crate engine is a GM Performance Parts-tested and validated 502 horsepower/567 lb.-ft. of torque combination.
The ZZ502/502 comes with aluminum oval-port, big-valve street heads that flow enough air to satisfy the demands of the hungry 4.47" bores and 4.00" stroke crankshaft. To ensure a long and productive life, this performance big-block is based on a Gen VI block with four-bolt mains, a forged steel crank, forged steel rods, and forged aluminum 9.6:1 pistons.
Startup - Timing