Chevrolet Performance Chev ZZ572 Deluxe Crate Engine 620hp # 19201333Crate Engine, GM ZZ572 Big Block, 620 HP, Deluxe Long Block, Internal Engine Balance, Aluminum Heads, Each Crate Engine Family: Chevy Big Block Actual Engine Displacement: 9. 4L 572 Crate Engine Cylinder Head Material: Aluminum Engine Block Material: Cast iron Advertised Compression Ratio: 9. 6: 1 Assembled: Yes Engine Balance: Internal Cam Style: Hydraulic roller, OE roller Rear Main Seal Style: 1 piece Intake Manifold Included: Yes Intake Manifold