Chevy ZZ572/620 Partial Engine

If you want a good foundation to build big block horsepower, look no further than the ZZ572 partial engine. You get the short block assembly of the ZZ572/620 horsepower engine from GM Performance. This gives you a 4 bolt main block with forged internals in an assembled package. You add your cam, timing chain, camshaft sprocket, oil pan, oil pump, or front cover. This gives you the chance to build a semi custom engine the way you want it.

Possible Applications

Possible Applications

  • One Bad Hot Rod
  • Wake up the neighbors
  • Pure Mean

*Applications have not been validated. They are merely suggestions of how you might enjoy your GM Performance Parts crate engine. Some applications may affect engine warranty. See specific warranty information. Some applications may not be emission legal; check state and local ordinances.

Part Number: 12499190
Engine type: Chevy big-block V-8
Displacement (cu in): 572
Bore x stroke (in): 4.560 x 4.375
Block (P/N 25534368): Cast iron with 4-bolt main caps
Crankshaft (P/N 88961554): Forged steel
Connecting rods (P/N 88962926): Forged steel, shot peened
Pistons (P/N 88962925): Forged aluminum
Maximum rpm: 6000

ZZ572 - 620 Partial Engine Image

Part #:12499190

zz572 - 620 R dyno image

Installation Notes

  • Clutch linkage boss is cast and machined in block, but must be 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 additional parts (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.
  • Intended for pre-1977 street vehicles or all off-road vehicles.
  • Not intended for marine applications.
  • You do have a strong transmission and rear axle, don’t you?