GM Performance Parts Largest Displacement, Most Powerful Street Crate Engine Ever!
Horsepower - 620 @ 5500 RPM
Torque - 650 FT. Lbs @ 4500 RPM
Maximum Recommended RPM - 6000 RPM
Compression Ratio - 9.6:1
Fuel - Premium pump gas
The new ZZ572/620 is built around an all-new Gen VI tall deck Bow Tie big block. This all new engine is filled with a forged 4340 steel crank with 4.375 inch stroke, shot peened, forged 4340 H-beam rods, and forged aluminum pistons with full floating wrist pins. Hard core race parts for hard core long term durability!
The redesigned rectangular port aluminum cylinder heads result in a pump gas friendly 9.6 to 1 compression ratio. A hydraulic roller cam with 0.632 inch lift actuates the stainless steel valves. And, of course, hardened chromemoly retainers, roller rocker arms, and dual valve springs are used to complete the valvetrain.
This engine makes 620 horsepower at 5500 RPM and 650 ft. lbs. of torque at 4500 RPM.
Pump gas friendly, massive torque and horsepower, all from GM, the ZZ572/620 is for those who consider excess to be barely enough.
GM Crate Engines are horsepower rated to SAE Standards.
This engine has a Mechanical Fuel Pump Provision (fuel pump not included).
This engine is internally balanced.
This engine-(deluxe version) includes a short aluminum water pump, 850 CFM Holley carburetor, automatic flexplate, HEI distributor, dual plane aluminum intake manifold, intake manifold gaskets, spark plugs.
This engine block has provisions for mechanical clutch linkage "Z bar" ball stud in both locations including the 1963-1982 Corvette location.