Chevrolet Performance L8P GEN V LT 6.6L Crate Engine 523hp # 19435523Chevrolet Performance L8P GEN V LT 6. 6L Crate Engine 523hp # 19435523 Crate Engine, L8P Rotating Assembly, 6. 6L, 400cid, 523 HP, 10. 8: 1 Compression, Cast Iron Block, Aluminum Heads, Hydraulic Roller Cam, Chevy, GMC Crate Engine Family: Chevy LT Gen V Actual Engine Displacement: 6. 6L 400 Crate Engine Cylinder Head Material: Aluminum Engine Block Material: Cast iron Advertised Compression Ratio: 10. 8: 1 Assembled: Yes Engine Balance: Internal Cam