12498825 - 572 Partial - (Shortblock) (720 HP Verison) - Discontinued
This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.
GM Performance Parts Largest Displacement, Most Powerful Crate Engine Ever!
This is the shortblock used to build GM's 572/620 HP Crate Engine.The final horsespower numbers will depend upon what you bolt to the shortblock.
Maximum Recommended RPM- 6750
Compression Ratio- With 118cc Heads 12.1:1-/With 110cc Heads 13.1:1
The all new ZZ572/620 is built around an all new Gen VI tall deck Bow Tie block.And is filled with the highest quality, most durable parts that GM has to offer! This is a serious big block, for a person looking for serious street/strip horsespower.Each 572 is assembled by hand and is built from the following list of parts-
Block-part # 25534368 - Sportsman, 10.200" Deck height, one piece rear main seal,Mechanical fuel pump provisions, fully CNC machined block,This block is powder coated Chevy orange, Honed cam and crankshaft bores, nodular iron 4 bolt main caps with grade 8 bolts splayed 16,machined for production type Gen VI roller camshaft.
Crankshaft-part # 88961554 Forged 4340 Steel, Internally balanced, crossdrilled 4.375" stroke. This crankshaft is manufactured by Callies for GM.
Connecting Rods-part # 88962926 Premium 4340 forged steel "H" beam with 7/16" rod bolts.These rods are manufactured by Eagle for GM.
Pistons- part # 88963227 Forged Aluminum. These Pistons are manufactured by J.E. for GM.
This 572 Shortblock does not include:
Camshaft or any valvetrain components
Oil pump pickup
Harmonic Balancer- Neutral balanced Damper must be used with this engine such as GM 88962814
Flexplate Or Flywheel - See notes below for flywheel reccomendations.
This engine does have a mechanical fuel pump provision on the block.
This engine block has provisions for mechanical clutch "Z" bar linkage in both locations including the 65'-76' Big Block Corvette location.
This engine uses a Gen VII internally balanced Flexplate part # 12561217 & 6 bolts part # 3727207. If a manual transmission flywheel is needed, part # 12555135 & 6-839756 flywheel bolts must be used, Remember that unlike the 454 and 502 engines, this engine is internally balanced. Using the wrong flywheel/flexplate can destroy the engine due to a severe out of balance situation.
A tall deck rectangular port intake manifold, or a standard deck rectangular port intake manifold with end rail spacers and a slip collar distributor must be used with this engine. The Gm intake manifold part # 88961161 is a special tall deck intake that has integrated end rail spacers, and the distributor mounting pad is modified so that a standard chevy distributor fits.
Any big block water pump can be used on this engine without problems.
- Item Requires Shipping
- 426.0 lbs.
- W44.0000” x H39.5000” x L36.0000”
- FREE 48 State Shipping
Total Reviews (0)
Write the First Review!
You must login to post a review.
May We Suggest
- We don’t just want your business today. We want to EARN your business for LIFE!
- USA Owned, Operated & Employed
- Installers & Resellers Click Here to Apply
We Specialize In:
- GM LS Conversions
- Engine & Trans Combo Kits
- Unique Ready to Run Engines
- Have a question?
- to Email our Sales & Tech Staff
- 888-748-4655 Mon-Fri 8AM-6PM EST
- Click above for 24/7 Live Chat Service.