GM LS Compatible 427 c.i. ProSeries Engine - 625 Horsepower - Long Block

Description: Horsepower & Torque: 625 Horsepower / 565 FT LBS Compression Ratio: 11:1 Aluminum Heads Hydraulic Roller Cam Forged Crank Forged Pistons Block: OEM 7.0L Aluminum Block Machined in the USA! 6-Bolt Main 4.0685" Bored 1-Piece Rear Main Seal Rotating Assembly: New Forged Crankshaft 4.125" Stroke Forged 6.125" Connecting Rods Forged Pistons Internally Balanced Cylinder Heads: BluePrint Aluminum Cylinder Heads - PS8015 70cc Chamber 2.165" Intake / 1.590" Exhaust Valves 259cc Intake / 102cc Exhaust Runners Cam Specs: Cam Type: Roller .624 Intake / .624 Exhaust Lift 239 Intake / 255 Exhaust Duration @.050-114 Degree Lobe Separation Ignition Timing: ECM Controlled (NOT Included - Customer Must Reprogram) Also Includes: Timing Cover LS3 Intake manifold Notes: This engine requires a non-weighted harmonic balancer, and non-weighted flex plate/flywheel. This engine is specifically designed to replace your existing LS engine - a direct replacement for Gen 4 applica