Newest 350 crate engine from GM

Developed with contemporary technologies, including a high-rpm valvetrain, the ZZ6 Turn-Key offers a modern twist on the classic 350 Small-Block — delivering more than 400 horsepower and more than 400 lb.-ft. of torque! The ZZ6 uses updated Fast Burn cylinder heads with beehive-style valve springs inspired by the LS engine family — a feature that enhances high-rpm capability to support more power than any factory-produced 350 engine ever installed in a Chevrolet production vehicle. The unique, tapered shape of the valve spring allows for the use of a smaller spring retainer, which reduces the reciprocating mass of the valvetrain, resulting in better valve dynamics. This ZZ6 Turn-Key kit includes the carburetor, distinctive valve covers and a matching air cleaner, the starter, distributor, alternator, and additional accessories such as the air conditioning compressor and front-end accessory drive system. Chevrolet Performance Crate Engines include a 24-month or 50,000-mile/80,000-kilometer limited warranty.

Engine Type: Chevy Small-Block Displacement (cu in): 350 Bore x Stroke (in.): 4.000 x 3.48 Block (P/N 10243870): Cast-iron with 4-bolt mains Crankshaft (P/N 12670965): Forged steel (shot peened) Connecting Rods (P/N 10108688): Forged powder metal Pistons (P/N 10159436): Hypereutectic aluminum Intake Manifold (P/N 12496822): Single-plane aluminum Carburetor (P/N 19170093): 770 cfm Holley Camshaft (P/N 10185071): Steel hydraulic roller Valve Lift (in): .474 intake/.510 exhaust Camshaft Duration (@.050 in): 208° intake / 221° exhaust Cylinder Heads (P/N 19300955): Fast Burn aluminum; 62cc chambers Valve Size (inches): 2.000 intake / 1.550 exhaust Compression Ratio: 9.72:1 nominal Rocker Arms (P/N 19210724): Aluminum roller style Rocker Arm Ratio: 1.5:1 Recommended Fuel: Premium pump Distributor (P/N 93440806): HEI Ignition timing: 36º Total @ 4,000 rpm Maximum Recommended RPM: 5,800 rpm Flexplate (P/N 14088765): 12.750" Balanced: External INSTALLATION NOTES • Comes with 12.750" externally balanced 153-tooth automatic transmission flexplate. Requires externally balanced flywheel for manual transmission. • Requires fuel line from fuel pump to carburetor • Designed for pre-1976 street vehicles or any off-road vehicle • Some assembly and minor engine tuning required • Not intended for marine applications