Description: Horsepower & Torque: 500 HP / 500 FT LBS Compression Ratio: 10.3:1 Aluminum Heads Hydraulic Roller Cam Forged Crank Forged Pistons Block: NEW BluePrint Cast Iron Block Manufactured and Machined in the USA! 4-Bolt Main 4.125" Bore 1-Piece Rear Main Seal Mech Fuel Pump Provision: Yes Passenger Side Dipstick Drilled and Tapped for Clutch Linkage Rotating Assembly: New BluePrint Forged Crankshaft 3.750" Stroke Forged Steel Crank 5.700" Connecting Rods Forged Pistons Internal Front / External Rear Engine Balance Cylinder Heads: BluePrint Aluminum Cylinder Heads - HP8103 64cc Chamber 2.08" Intake / 1.60" Exhaust Valves 220cc Intake / 67cc Exhaust Runners Cam Specs: Cam Type: Roller .555 Intake / .576 Exhaust Lift 236 Intake / 242 Exhaust Duration @ .050-110 Degree Lobe Separation Ignition Timing: 10-16 Degrees Initial and Total Timing 32-34 Degrees at 3500 RPM Also Includes: Valve Covers Oil Pan Timing Cover Notes: Not for EGR. The performance aluminum cylinder heads on this engine feature a .500 raised port vs OEM.