Chevrolet Performance ZZ572/720R Deluxe Long Block Crate Engines

Chevrolet Performance's largest, most powerful engine is here. The ZZ572/720R Deluxe long block crate engines are built around an all-new generation VI one-piece main seal tall deck 572 c.i.d.—with approximately 12.0:1 compression, 720 hp at 6,250 rpm, and 685 lbs.-ft. of torque at 4,500 rpm, with a recommended max rpm of 6,750. These all-new race blocks have a forged 4340 steel crank, shot-peened forged 4340 H-beam rods, and forged aluminum pistons with full floating wrist pins. Other features include: redesigned rectangular port aluminum cylinder heads with 118cc combustion chambers; and stainless steel valves at 2.25 in. intake side and 1.88 in. exhaust side. Mechanical roller camshafts are used, with valve lift being .714 in. intake and .714 in. exhaust side; duration at .050 in. for intake is 266 degrees and 274 degrees exhaust side. Hardened chromoly retainers are used, with dual valve springs 1.50 in. coil diameter. Additional specs: Aluminum roller rockers with 1.7:1 ratios, and high performance one-piece pushrods are installed. A new Chevrolet Performance tall deck single-plane intake manifold and a 1,150 cfm Dominator carburetor deliver the air. A multiple spark discharge distributor handles ignition; spark plugs and wire are included. Also included are screened and louvered windage trays and high-rpm torsional dampers. Show Less