19435523 L8P 6.6L Chevrolet Performance Engine Assembly

523hp @ 5,800 rpm and 543 lb/-ft @4,600 rpm

By combining the larte-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 Performance crate engine.

Rated at 523 horsepower and 543 lb.-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, featruing 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 six-bolt, cross-bolted main caps contribute to the engine's strength and durability.

The new L8P builds on that with a unique, upgrade3d valvetrain featuring performance-oriented valves and springs, along with a unique camshaft that is bassed 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-buuilding attributes of the Corvette camshaft. Put it to work in your project.

Note:

• Use with the new engine control kit PN 19435524, which includes a programmed controller, wire harness, pedal, oxygetn sensors and mounts, MAD, Fuel Line Pressure Sensor and Fuel Pump Power Module(FPPM).
• Flexplate PN 12685003 must be purchased for these engines to be compatable with the 10 speed supermatic transmission. 10 speed supermatic transmission use 6 bolts to attach the torque convter.

Fast Facts:
Displacement: 400 cu. in. (6.6L)
Bore x Stroke: 4.06 in. x 3.86 in.
Cranshaft: Forged steel
Pistons: Hypereutectic aluminum
Compression Ration: 10.8:1
Cylinder Heads: Rectangular port
Camshaft Type> Billet steel hydraulic roller
Camshaft Duration: 218deg intake/231deg exhaust @ .050 in.
Fuel Delivery: Direcdt injection with high-pressure pump
Horsepower: 523@5800 rpm
Torque (lb.-ft.): 543@4800 rpm

TECH SPECS

Engine Type: Gen V Small Block V-8 directinjection spark ignition
Displacement (cu in): 400 (6.6L)
Bore x Stroke (in / mm): 4.060 x 3.860 (103.25 mm x 98 mm)
Block (P/N 19420904): Cast iron with 6-bolt no dularmain bearing caps
Crankshaft (P/N 12708884): Forged steel
Connecting Rods (P/N 12675746): Forged powder-metal
Pistons (P/N 12737834-R, 12737835-L): Hypereutectic aluminum
Camshaft Type (P/N 12736191): Billet steel hydraulic roller
Valve Lift (in): 0.549 intake / 0.549 exhaust
Camshaft Duration (@0.050"): 218 deg intake / 231deg exhaust
Cylinder Heads (P/N 12736192): Aluminum rectangular port D/I with 59.02cc chambers
Valve Size (in): 2.130 hollow intake /1.590 inconel exhaust
Compression Ratio: 10.8:1 (nominal)
Rocker Arms (P/N 12619829): Investment cast roller trunnion
Rocker Arm Ratio: 1.8:1
Intake manifold (P/N 12639087): Composite
Throttle body (P/N 12730580): 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: 6000 rpm
Reluctor wheel: 58X
Balanced: Internal

Link to Installation Guide