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ZZ4 350 Turn-Key Chevy Crate Engine - An aluminum-headed 350 that makes 355 horsepower!

As far as crate engines go, this one is a winner. The ZZ4 350 Turn-Key crate engine has been one of our most popular high performance crate engines since we started GM Performance Parts. Its legendary status is based on an incredible performance level that is stone cold reliable. We’ve packed the ZZ4 350 Chevy crate engine with a forged steel crankshaft, hypereutectic pistons, hydraulic roller camshaft and lifters, and aluminum cylinder heads. The ZZ4’s Corvette-derived high-performance heads feature high velocity intake runners and D-shaped exhaust ports to promote efficient and unobstructed flow through the engine—providing strong power and torque at all RPM levels.

The ZZ4 350 is delivered with an aluminum dual-plane intake manifold, HEI distributor, cast iron water pump, damper, and flexplate. Our Turn-Key ZZ4 350 crate engine also ships with all the parts you need to get it running. That includes an accessory drive package, fuel pump, chrome air cleaner kit, Holley 750-cfm carburetor, starter, and spark plug wires.

The ZZ4 comes to you with a full 355 horsepower and 405 lb.-ft. of torque. With its high level of performance and durability, it could very well be the perfect crate engine—able to meet the needs of car builders from all phases of the motorsports world.

NOTE: Intended for pre-1977 street vehicles and all off-road vehicles. Not intended for marine use.

Possible Applications*

  • Get that low 12-second bracket car going
  • A new bullet for your Friday night cruiser
  • A vintage Chevy that deserves a new heart

*Applications have not been validated. They are merely suggestions of how you might enjoy your GM Performance Parts crate engine. Some applications may affect engine warranty. See specific warranty information. Some applications may not be emission legal; check state and local ordinances.

ZZ4 350 TURN-KEY TECH SPECS:
Part Number: 12499712
Engine type: Chevy small-block V-8
Displacement (cu in): 350
Bore x stroke (in)cf6 : 4.00 x 3.48
Block (P/N 10105123): Cast iron with 4-bolt main caps
Crankshaft (P/N 12556307): Forged steel
Connecting rods (P/N 10108688): Powdered metal steel
Pistons (P/N 10159436): High-silicon aluminum with offset pins
Camshaft type (P/N 10185071): Steel hydraulic roller
Camshaft lift (in): .474 intake / .510 exhaust
Camshaft duration (@.050 in): 208'c1 intake / 221'c1 exhaust
Cylinder heads (P/N 12556463): Aluminum; 58cc chambers
Valve size (in): 1.94 intake / 1.50 exhaust
Compression ratio: 10:1
Rocker arms (P/N 10089648): Stamped steel
Rocker arm ratio: 1.5:1
Recommended fuel: 92 octane
Ignition timing: 10'c1 BTDC @ 800 rpm, cf0 32'c1 total @ 4000 rpm with vacuum advance disconnected
Maximum rpm: 5800

Chevy Performance 350 ZZ4 Turnkey GM Crate Engine

Part #:19201330

350 ZZ4 Turn-Key

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Installation Notes

  • Comes with 12.75" externally balanced automatic transmission flexplate; change to externally balanced flywheel for manual transmission applications. See chart on page 171.
  • Intended for pre-1977 street vehicles or all off-road vehicles.
  • Not intended for marine use.
  • Requires fuel line from fuel pump to carburetor.
  • Fuel pump pressure is pre-set, fuel pressure regulator not required.
  • Some assembly required.
  • NOTE: Distributor with melonized steel gear MUST be used with long blocks and partial engines with steel camshafts, or engine damage will occur.