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By combining the large-displacement and heavy-duty elements of the L8T 6.6L engine and a unique camshaft based off the Corvette Stingray's high-revving LT2 V-8, Chevrolet Performance engineers have created the all-new L8P 400 c.i.d. Performance crate engine. Rated at 523 hp and 543 lbs.-ft. of torque, it offers your project a unique and naturally aspirated combination of big-displacement torque and high-rpm horsepower. The L8T 6.6L foundation is the same high-strength, big-displacement engine found in the Silverado HD from 2020 to present day, featuring a forged steel crankshaft and high-strength components. Additional features such as oil-spray cooling for the pistons and a cast iron, long-skirt cylinder block with 6-bolt, cross-bolted main caps contribute to the engine's strength and durability. The new L8P builds on that with a unique, upgraded valvetrain featuring performance-oriented valves and springs, along with a unique camshaft that is based off the Corvette Stingray's LT2 engine. It has a non-active fuel management profile and more duration than the L8t's camshaft. It's the best of both engines: the largest displacement in the LT family and the power-building attributes of the Corvette camshaft. Put it to work in your project. Fast Facts: * Displacement: 400 cu. in. (6.6L) * Bore x Stroke: 4.06 in. x 3.86 in. * Crankshaft: Forged steel * Pistons: Hypereutectic aluminum * Compression ratio: 10.8:1 * Cylinder heads: Rectangular port D/I with 59.02cc chambers * Camshaft type: Billet steel hydraulic roller * Camshaft duration: 218 degree intake/231 degree exhaust at .050 in. * Fuel delivery: Direct injection with high-pressure pump * Horsepower: 523 at 5,800 rpm * Torque (lbs.-ft.): 543 at 4,800 rpm * Engine type: Gen V small block V-8 direct injection spark ignition * Block: Cast iron with 6-bolt no Dula main bearing caps * Connecting rods: Forged powder-metal * Valve lift (in.): 0.549 intake / 0.549 exhaust * Rocker arms: Investment cast roller trunnion * Rocker arm ratio: 1.8:1 * Intake manifold: Composite * Throttle body: 87mm diameter (single-bore) * Fuel delivery: High-pressure direct injection (2,175 psi / 150 bar) * Recommended fuel: Premium pump * Ignition system: Coil-on-plug * Maximum recommended RPM: 6,000 rpm * Reluctor wheel: 58X * Balanced: Internal * Note: Use with the new engine control kit, P/N 19435524, which includes a programmed controller, wire harness, pedal, oxygen sensors and mounts, MAD, fuel line pressure sensor and fuel pump power module. Flexplate P/N 12685003 must be purchased for these engines to be compatible with the 10-speed supermatic transmission. 10-speed supermatic transmission uses six bolts to attach the torque converter.
Not Yet Reviewed
$8,948.80
Crower billet crankshafts offer premium quality at not-so-premium prices. Crower manufactures these from milled round bars to produce steel billet crankshafts for just about any engine make and horsepower needs. Premium materials--either billet 4340 chromoly or EN30B steel--are used to create their cranks. They are precision CNC-machined on state-of-the-art equipment by master craftsmen for precise indexing and throw-to-throw consistency. Choose a better made billet crankshaft from Crower and choose peace of mind.
Not Yet Reviewed
$5,107.99
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$7,736.99
Ford Performance Parts 427 c.i.d. Boss short block assemblies provide you with the perfect foundation for building your high-horsepower Boss engine. They start out with an iron 4-bolt main Boss block with a 9.500 in. deck height, then add a 4.000 in. stroke steel crankshaft and a set of forged steel H-beam connecting rods with floating pins, and top that off with a set of 4.125 in. bore forged pistons. Ford Performance Parts 427 c.i.d. Boss short block assemblies require Boss cylinder head bolts or studs and Ford Performance Parts or aftermarket cylinder heads. Additional technical information: * Engine type: 351 based small block Ford * Iron 4-bolt main block with 9.5 in. deck height (M-6010-Z351) * .005 in. below piston to deck height (nominal) * SCAT forged steel 4.000 in. stroke crankshaft * SCAT forged steel H beam connecting rods with floating pins and ARP bolts * Mahle 4.125 in. forged pistons, with reliefs for Z304D, Z304P, N351, and other inline valve Windsor cylinder heads * 17 cc piston dish; check piston to valve clearance * Hydraulic roller camshaft compatible; requires aftermarket tie bar hydraulic lifters * 0.060-inch oil galley restrictors included for solid roller cam applications * Internally balanced * Uses standard Windsor timing cover (M-6059-D351) * Standard Windsor oil pan flange * Recommended cylinder head fasteners M-6065-BOSS head bolts or M-6014-BOSS studs depending on application * Compatible with most aftermarket performance cylinder heads; designed for 20 degree valve angle heads and will fit stock or spread valve guide centerlines * Not designed for production 302/351W or M-6049-Y302/Y303/X302/X303/X304/X305 cylinder heads * Requires M-6051-R351 head gaskets * High-performance harmonic balancer M-6316-D302 recommended * Built with all new parts * Hand assembled in the USA with performance clearances * Photo and specifications may vary
Not Yet Reviewed
$5,333.99
Edelbrock LS bare race blocks are designed to meet the needs of today's high performance engine builders and racing enthusiasts. They are available in standard and tall deck height combinations and are engineered for maximum clearance around a 4.600 in. stroke crankshaft. With their unique design, Edelbrock engineers were able to minimize windage in the rotating assembly, leading to superior engine lubrication at higher rpm. To make them friendly for existing race applications, these blocks contain both factory and motor plate race mounts for Gen I, II, III, and IV engines. Each LS bare race block receives a CT scan to ensure maximum performance and consistency. Standard features include: * Designed from aircraft-quality A357 T-6 aluminum * Siamese cast bore walls (4.125 in. or 4.165 in. diameter) with press-in cast iron sleeves * Machined with 55mm cam bearing journal * Available in standard (9.240 in.) and tall (9.750 in.) deck heights with beefy deck thicknesses (.500 in. standard/.750 in. tall deck); standard (5.87 in.) and tall (6.38 in.) deck cylinder sleeves are available * 6-head bolt design with full water jacket around cylinder walls; large windows in the valley allow access to an inboard 6th head bolt * Block design includes large front and rear -12AN side feeds for serious dry sump setups * Material for oversized lifters with lifter bosses are designed to clear tie bar-style lifters
Not Yet Reviewed
$6,904.95
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