The ZZ4 350 Turn-Key crate engine has a forged steel crankshaft, hypereutectic pistons, hydraulic roller cam and aluminum cylinder heads. The ZZ4's Corvette-derived high-performance heads feature high ...
Our combo this month was a GMPP crate engine producing 290 hp at 5,100 rpm and 326 lb-ft of torque at 3,750 from the factory. With its 8.5:1 compression, four-bolt block, and small street cam, this ...
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