Chevrolet Performance L8P Crate Engine

We’ve optimized every cubic inch of our largest-displacement LT engine with the unique L8P performance crate engine. With 523 horsepower and 543 lb.-ft. of torque, this package combines the displacement and heavy-duty strength of our
production-based L8T 6.6L engine plus a unique LT2-based camshaft.

It’s all rooted in the tough foundation of the L8T, with a forged steel crankshaft, high-strength parts, high-flow heads and composite intake manifold. We then add a more performance-oriented valvetrain, including valves, springs, and a
unique non-AFM (Active Fuel Management) LT2-based camshaft. The net re-sult is an increase of 122 horsepower and 79 lb.-ft. of torque over the production 6.6L engine.

Our L8P crate engine package comes complete from the throttle body to the oil pan, including the PCV tube, evap tube, oil dipstick, oil fill tube and cap. It does not include the controller, harness, oxygen sensors or a Front-End Accessory
Drive system. See Installation Notes below for recommendations.

INSTALLATION NOTES

• Engine is shipped with high-pressure direct-injection fuel pump installed
• Front End Accessory Drive system must be ordered separately and includes hydraulic power steering, with center pulley. Pulley-mounted fan not recommended.
• Includes 8-bolt flexplate for automatic transmissions
• Use with Engine Control kit 19435524 (must use 6L80-E transmission)

TECH SPECS
Part Number: 19435523
Engine Type: Gen V Small Block V-8 direct injection spark ignition
Displacement (cu in): 400 (6.6L)
Bore x Stroke (in / mm): 4.065 x 3.860 (103.25 mm x 98 mm)
Block (P/N 19420904): Cast iron with 6-bolt nodular main 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 in): 218º intake / 231º exhaust
Cylinder Heads (P/N 12736192): Aluminum rectangular port D/I with 59.02cc chambers
Valve Size (in): 2.130 hollow intake / 1.590 sodium-filled exhaust
Compression Ratio: 10.8:1
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 unleaded - 91 (R+M)/2
Ignition system: Coil-on-plug
Maximum Recommended RPM: 6000 rpm
Reluctor wheel: 58X