ZZ572/620 Deluxe Engine, 621HP @ 5400 RPM

Name: ZZ572/620 Deluxe Engine, 621HP @ 5400 RPM
Brand: CHEVROLET PERFORMANCE
SKU: 809-19331583
Price: 23657.76 USD
Availability: InStock

^$23,657⁷⁶

Truck Freight

Ships on Sep 15, 2026

Lowest Price Guarantee

621HP @ 5400 RPM
645 ft/lbs. TQ @ 4200 RPM
4 Bolt Main Tall Deck Big Block
Aluminum Rectangular Port Heads
Includes Warranty

INSTALLATION NOTES:
Due to crate fitment, the carburetor is shipped in a separate box and needs to be installed by an engine installer
Clutch linkage boss is now drilled and tapped. When using cast-iron exhaust manifolds, lower head bolts may need to be replaced with bolts with shorter heads for clearance
Requires addition of starter and fuel pump (not included)
Gen VI tall-deck block has machined mechanical fuel pump boss
Comes with a 14' automatic transmission flexplate. Requires internally balanced flywheel for manual transmission applications
Designed for pre-1976 street vehicles or any off-road vehicle
Not intended for marine applications
You do have a strong transmission and rear axle, don't you?
Distributor with melonized steel gear MUST be used with steel camshafts, or engine damage will occur.
Engine Break-In Procedure
Use conventional or break-in oil (non-synthetic) for the first oil change, be sure to check the oil level in the engine and prime the oil system with an engine priming tool.
Engines with flat tappet hydraulic cams only - Run the engine between 2,000 and 2,500 RPM's, with no-load on the engine for the first 30 minutes. This is critical to break in the camshaft.
Drive the vehicle with varying speeds and loads on the engine for the first 30 miles. Be sure not to use a lot of throttle or high RPM. Run five or six medium-throttle accelerations to about 3000 RPM (40 to 50 MPH), then letting off in gear and coasting back down to 20 MPH. Run a couple of hard throttle accelerations up to about 5000 RPM (55 to 60 MPH), then letting off in gear and coasting back down to 20 MPH.
Let the engine cool and change the oil and filter using conventional (non-synthetic) oil and check coolant level, top off if necessary. Drive the next 500 miles normally, without high RPM's (below 5000 RPM), hard use, or extended periods of high loading. Change the oil and oil filter again using conventional (non-synthetic) oil. Keep an eye on oil level during the first thousand or so miles.
It would be suitable to use synthetic motor oil after the second recommended oil change and mileage accumulation.

Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

The Most Powerful Big-Block Street Engine from Chevrolet Performance

The ZZ572/620 is the ultimate expression of Chevrolet Performance's engineering capability. They build the ZZ572 with huge 4.560-inch bores and add a forged 4.375-inch-stroke crankshaft. To make sure those cylinders are packed with every cubic centimeter's worth of atmosphere, we use a camshaft with incredible 0.632/0.632-inch lift and 254°/264° duration specifications.

Aluminum rectangular-port heads with 310cc intake ports complement the airflow capability offered by the big-bore bottom end. They also feature 118cc raised exhaust ports and 118cc combustion chambers. The valves are big, too - measuring 2.250 inches on the intake side and 1.880 inches on the exhausts.

Chevrolet Performance delivers the ZZ572/620 Deluxe with an 850-cfm carburetor, HEI distributor, aluminum water pump, and distinctive orange powder-coated valve covers that proudly proclaim the 572 legend.

ZZ572/620 DELUXE TECH SPECS: