GM Performance 12561723 - GM Performance Parts 350 ZZ4 HO Short Block Assembly

A Solid Foundation
for Your Next Project

With its four-bolt main block, forged steel crankshaft, forged powdered metal connecting rods, and light flat top hypereutectic pistons, the ZZ partial engine assembly ensures high-RPM performance. Its provisions for a steel roller camshaft and one-piece rear main seal are state-of-the-art.

Note: Camshaft, timing chain, sprockets, front cover, oil pump, oil pan, balancer, and flexplate not included

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