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ZZ572/620 Base

ZZ572/620 Base

SKU: 19331581

Proving the adage there’s no replacement for displacement, the ZZ572/620 is the ultimate expression of Chevrolet Performance’s engineering capability, wrapped up in a soul-stirring combination of performance and attitude. We build the ZZ572/620 with huge 4.560-inch bores and a 4.375-inch stroke to help it deliver 621 hp and a stunning 645 lb.-ft. of grunt!

Strength comes from a latest-generation tall-deck block casting with four-bolt main caps and an all-forged rotating assembly, while high-flow aluminum rectangular-port cylinder heads with massive 310cc intake passages, 118cc raised exhaust ports and 118cc combustion chambers process tremendous airflow. A hydraulic roller camshaft with incredible 0.632/0.632-inch lift and 254/264-degree duration specifications optimizes the airflow volume enabled by the large-port heads.

  • Horsepower

    621 HP

  • Torque

    645 LB-FT

  • Tech Specs

    Part Number: 19331583
    Engine Type: Chevy Tall-Deck Big-Block V-8
    Displacement (cu in): 572
    Bore x Stroke (in): 4.560 x 4.375
    Block (P/N 19212195): 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
    Camshaft Type (P/N 19210721): Hydraulic roller
    Camshaft Lift (in): .632 intake / .632 exhaust
    Camshaft Duration (@.050 in): 254° intake / 264° exhaust
    Cylinder Heads (P/N 19331429): Aluminum rectangular port, 118cc chambers
    Valve Size (in): 2.250 intake / 1.88 exhaust; stainless steel
    Compression Ratio: 9.6:1
    Rocker Arms (P/N 19210726): Aluminum roller style
    Rocker Arm Ratio: 1.7:1
    Recommended Fuel: Premium pump
    Ignition Timing: 36° Total at 4,000 rpm
    Maximum Recommended rpm: 6,000
    Balanced: Internal

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