BluePrint Engines GM 400 C.I.D. 508 HP Drop-in-Ready EFI Long Block Crate Engines

BluePrint Engines GM 400 C.I.D. 508 hp Drop-in-Ready EFI long block crate engines are fully Dyno tested, passed vigorous inspections, and are prepared to power up your project. These GM compatible engines will replace your tired old factory engine with fuel-injected performance. They are offered with or without front accessory drive kit. Features, specs, and contents: * Horsepower and torque: 508 hp/473 lb.-ft. * Cast iron block * 4-bolt main * 4.125 in. bore * Forged crankshaft * 3.750 in. stroke * OEM-type 5.700 in. connecting rods with 150,000 psi bolts * Forged pistons * Aluminum cylinder heads--64cc chamber * 2.08 in. intake/1.60 in. exhaust valves * 220cc intake/67cc exhaust runners * Roller cam * .555 intake/.576 exhaust * 236 intake/242 exhaust duration at .050 * 110 degree lobe separation * Holley Sniper EFI, intake manifold dual plane, valve covers, oil pan, timing cover, water pump, spark plugs and wires, distributor, harmonic balancer * 30 month/50,000 mile warranty Show Less