What Is A ZZ4 Crate Motor?
What Is A ZZ4 Crate Motor? The ZZ4 350 Turn-Key crate engine has been one of the most popular high performance crate engines since GM Performance Parts was started. … The ZZ4 350 crate engine is packed with a forged steel crankshaft, hypereutectic pistons, hydraulic roller camshaft and lifters, and aluminum cylinder heads. What is