ZZ572 CRATE ENGINE

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GM CRATE ENGINE ZZ572 / 620 Deluxe

GM'S LARGEST MOST POWERFUL STREET ENGINE

The new ZZ572 / 620 Deluxe is built around an all-new Gen VI tall deck Bow Tie cylinder block.

This all new ZZ572 race block 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.

Each ZZ572 is fitted with an 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.

A new ZZ572 GM tall deck single plane intake manifold and 850 CFM Demon carburetor deliver enough air and fuel to make the 620 horsepower at 5500 RPM and 650 ft.lbs. of torque at 4500 RPM. Ignition is handled by a GM HEI distributor.

Pump gas friendly, massive torque and horsepower, all from GM, the ZZ572 / 620 is for those who consider excess to be barely enough. All of this and it still comes with a warranty. For start-up and break-in instructions click here.

...AND THE R STANDS FOR RACE!

Engineered by GM Performance Parts and GM Racing exclusively for sportsman racers, the new ZZ572 / 720R is built around an all-new Gen VI tall deck Bow Tie cylinder block.

This all new ZZ572 race block is filled with a forged 4340 steel crank with 4.375 inch stroke, shot peened forged 4340 Hbeam rods, and forged aluminum pistons with full floating wrist pins. Plasma moly piston rings are standard is the screened and louvered windage tray.

GMs ZZ572 first purpose built drag race engine is filled with hard core race parts for hard core performance and long term durability.
The redesigned rectangular port aluminum cylinder heads result in a race gas only 12 to 1 compression ratio.
This ZZ572 comes with an solid roller cam with 0.714 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 valve train.

A new ZZ572 GM tall deck single plane intake manifold and 1095 CFM King Demon carburetor deliver enough air and fuel to make the 720 horsepower at 6250 RPM and 685 ft.lbs. of torque at 4500 RPM. Ignition is handled by a multiple spark discharge ignition. And an SFI approved torsional damper is installed at the factory. Out of the crate and into your race car its just that simple. Race gas fueled, high revving horsepower, all from GM, the ZZ572 / 720R is the engine that will get you down the track consistently, pass after pass, season after season.  For start-up and break-in instructions click here.