Chevrolet Performance LS 376/525 LS3 Long Block Crate Engine # 19435110Crate Engine, LS 376 525 LS3 Long Block, Internal Balance, Hydraulic Roller, OE Roller, Aluminum Block and Cylinder Heads, Chevrolet, 6. 2L LS, Each Crate Engine Family: Chevy LS Actual Engine Displacement: 6. 2L 376 Crate Engine Cylinder Head Material: Aluminum Engine Block Material: Aluminum Advertised Compression Ratio: 10. 7: 1 Assembled: Yes Engine Balance: Internal Cam Style: Hydraulic roller, OE roller Rear Main Seal Style: 1 piece Intake