Make no mistake, the ZZ572/720R is a race motor. It delivers a resounding 720 horsepower and 685 lb.-ft. of torque - creating at the same time the most powerful big block crate engine ever offered by GM Performance Parts.

We took the ultra-popular ZZ572/620 pump gas street engine added 12:1 compression pistons, a hotter camshaft, and our rectangular-port aluminum Bowtie heads with stiffer valve springs to work with the new cam. The block is the Gen VI tall-deck Bowtie block which was designed for the 572" application. The solid roller camshaft is a .714" lift magic maker that aggressively feeds the air/fuel mixture into the hungry, high-squeeze, stroker big block. This creates a rev-happy monster that rocks to a 6750 rpm redline, leaving the competition in its wake.

The ZZ572/720R is rated at 720 horsepower at 6250 rpm and 685 lb.-ft. of torque at 4500 rpm. The short block is built with the best heavy-duty parts in the GM Performance Parts part bin, including a 4340 forged steel crankshaft, shot-peened forged steel rods, forged aluminum pistons with full-floating wrist pins, stiff dual valve springs, and a louvered oiling windage tray. Our Deluxe ZZ572/720R ships with a Holley four-barrel carburetor, tall-deck single-plane intake manifold, HEI distributor, aluminum short-style water pump, and 8mm spark plug wires. Distinctive “572 CHEVROLET” cast aluminum valve covers complete the package. GM Performance Parts integrated, durability-tested, and validated this combination to the described performance levels, and all you need is a GM Performance Parts lightweight starter to fire it up!

ZZ572/720R Deluxe Tech Specs:
Part Number: 12498827
Displacement (cu in): 572
Bore x stroke (in): 4.560 x 4.375br> 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 88963227): Forged aluminum
Camshaft type (P/N 88962216): Mechanical roller
Camshaft lift (in): .714 intake/.714 exhaust
Camshaft duration (@ .050 in): 266° intake/274° exhaust
Cylinder heads (P/N 88961160): Aluminum rectangular port; 118cc chambers
Valve size (in): 2.25 intake/1.88 exhaust; stainless steel
Compression ratio: 12:1
Rocker arms (P/N 12361323): Aluminum roller style
Rock arm ratio: 1.7:1
Distributor (P/N 10093387): Electronic ignition
Carburetor (P/N 19170096): 1090 cfm Dominator
Water Pump (P/N 14058915): Aluminum; short-style
Spark plugs & wires: Included
Starter (P/N 9000852): Included Flexplate (P/N 10185034): 14"
Recommended fuel: 110 octane race gas
Maximum recommended rpm: 6750br> Balanced: Internal


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