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Details: 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 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. GMGÇÖs 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. A 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 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 GÇô itGÇÖs 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.
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572 cid ZZ572R 720HP/685 Long Block
