The GM Performance ZZ572/620 is built with an all-new Gen VI tall deck Bow Tie big block and is filled with a forged 4340 steel crank with 4.375 inch stroke, shot peaned, forged 4340 H-beam rods, and forged aluminum pistons with full floating wrist pins. Built to last!
The redesigned rectangular port aluminum cylinder heads provide a pump gas friendly 9.6 to 1 compression ratio, hydraulic roller cam with 0.632 inch lift actuates the stainless steel valves.and chromemoly retainers, roller rocker arms, and dual valve springs are used to complete the valve train.
This engine makes an incredible 620 horsepower at 5500 RPM and 650 ft. lbs. of torque at 4500 RPM.
The ZZ572/620, for when big is never big enough!
ZZ572/620 Base Engine
The ZZ572/620 features rectangular port aluminum cylinder heads that deliver 9.6:1 compression ratio in a pump-gas-friendly package.
General Motors Warranty Information
HORSEPOWER: 620Hp at 5500 RPM
TORQUE: 650 lbs. ft at 4500 RPM
Maximum RPM: 6000
Compression Ratio: 9.6:1
Partial Engine 12499190
Block 25534368 Tall Deck
Bearing Kit, Mains 88962212
Bearing Kit, Camshaft 12499434
Crankshaft 88961554 Forged 4340 Steel
Connecting Rods 88962926 Forged Steel
Bearing Kit, Connecting Rod 88961556
Piston & Pin 88962925 Forged Aluminum
Piston Rings 12499212 Plasma-moly
Camshaft 88961557 Hydraulic roller
Balancer 88962814 (SFI Approved)
Cylinder Heads 12499255 Aluminum
Head Gaskets 88961561
Rocker Covers (pair) 12499200
Intake Valves 12366987 2.25" Stainless steel
Exhaust Valves 88963128 1.88" Stainless steel
Valve, Springs 88963934
Valve, Retainers 12366990 Chrome moly steel
Key, Valve Retainer 12366992
Key, Valve Spring 88963937
Rocker Arms 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
Oil Pan Gasket 10106407
Oil Pump Assembly 88963707
Spark Plugs 5613878 - R45XLS
This engine has a Mechanical Fuel Pump Provision.
This engine is internally balanced.
This engine does not include a water pump, carburetor, flexplate, distributor, intake manifold.
The block has provisions for mechanical clutch linkage "Z bar" ball stud.