HORSEPOWER: 620 at 5500 rpm
TORQUE: 650 FT. Lbs at 4500 RPM
Maximum Recommended RPM: 6000
Compression Ratio: 9.6:1
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.
Technical Notes: This engine has a Mechanical Fuel Pump Provision.
This engine is internally balanced.
This engine (Long Block)does not include: water pump, carburetor, flexplate, distributor, intake manifold, intake manifold gaskets or spark plugs.
Please remember that this is a tall deck engine, so it requires a tall deck intake manifold and a slip collar distributor.
This engine block has provisions for mechanical clutch linkage "Z bar" ball stud in both locations including the 1963-1982 Corvette location.
Partial Engine 12499190
Block 25534368 Tall Deck
Bearing Kit, Main 88962212
Bearing Kit, Camshaft 12499434
Crankshaft 88961554 Forged 4340 Steel
Connecting Rod 88962926 Forged 4340 Steel
Bearing Kit, Connecting Rod 88961556
Piston & Pin 88962925 Forged Aluminum
Piston Ring 12499212 Plasma-moly
Camshaft 88961557 Hydraulic roller
Balancer 88962814 SFI Approved
Cylinder Head 12499255 Aluminum
Gasket, Head 88961561
Rocker Covers, pare 12499200
Valve, Intake 12366987 2.25" Stainless steel
Valve, Exhaust 88963128 1.88" Stainless steel
Valve, Spring 88963934 Dual
Valve, Retainer 12366990 Chrome moly steel
Key, Valve Retainer 12366992
Key, Valve Spring 88963937
Rocker Arm 12361323 Roller 1.7:1
Lifters 17120060 Hydraulic Roller
Push Rod, Intake 88961559 High performance one piece
Push Rod, Exhaust 88961558 High performance one piece
Oil Pan 10240721
Windage Tray, Oil 88962187 Screened and louvered
Gasket, Oil Pan 10106407
Oil Pump 88963707
Spark Plug 5613878 - R45XLS
General Motors limited 2 year / 50,000 mile parts & labor warranty. Click on Document tab above for full details.
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