GM Performance Parts Chevrolet ZZ4 Crate Engine

The Chevrolet Performance ZZ4 is a new 350-cubic-inch small-block V8 rated at 355 HP at 5,250 RPM and 405 lb-ft of torque at 3,500 RPM, built with aluminum cylinder heads, a forged steel crankshaft, and a hydraulic roller camshaft on a 10.0:1 compression ratio.

Who it suits

This engine has long been a go-to for classic Chevy restorations, including Camaro, Chevelle, Corvette, and Nova projects, as well as hot rods and street performance builds that want proven small-block power without chasing down a custom combination of parts.

What to know before fitting it

Because it uses a traditional small-block Chevy bolt pattern and mounting layout, it should drop into most chassis already set up for a small-block swap, but confirm your motor mounts, accessory drive, and exhaust clearance before ordering. The aluminum heads keep weight down compared with an iron-head small-block, which can help with front-end balance on a street or hot rod build.

Common questions

What's the power band like? Peak power arrives at 5,250 RPM with peak torque lower in the range at 3,500 RPM, a broad curve suited to street driving rather than a narrow, high-strung one.

Does it include accessories like an alternator? This listing covers the engine itself; confirm with us which accessories are included before ordering.

Is this a good first engine swap? Its straightforward small-block layout and wide parts availability make it a common choice for a first V8 build.