19435523 - L8P 6.6L 523 HP Crate Engine by Chevrolet Performance

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 camshaft based off the LT2.

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 an LT2- based camshaft. It features more lift and duration to help draw more air and fuel into the engine, which helps build power.

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
• Use Front End Accessory Drive system P/N 19433745 for applications with air conditioning and Front End Accessory Drive system P/N 19433746 for applications without air conditioning
• Includes 8-bolt flexplate for automatic transmissions
• Use with Engine Control kit 19435524 (must use 6L80-E transmission).

Specifications:
Power: 523HP @ 5800 RPM, 543 ft. lbs. of torque @ 4600 RPM
Displacement: 400 CID, 6.6L
Bore x Stroke: 4.060” x 3.860”
Compression Ratio: 10.8:1
Recommended Fuel: 91 Octane
Block: Cast Cast irong with 6 bolt cross bolted main caps
Crankshaft: 8-bolt Forged Steel
Connecting Rods: Forged Powdered Metal Steel
Pistons: Hypereutectic Aluminum
Camshaft: Billet Steel Hydraulic Roller Tappet
Cam Lift: .549” Intake / .549” exhaust
Cam Duration @ .050”: 218 deg. Intake / 231 deg. Exhaust
Lobe Separation: N/A
Cylinder Heads: Aluminum Rectangular Port, Direct Injected
Combustion Chamber: 59cc
Valves: 2.130” Intake/ 1.590” Exhaust
Rocker Arms: Cast Roller Trunnion, 1.81:1 Ratio
Balance: Internal
Reluctor: 58X
Maximum GM Recommended RPM: 6000

Engine Includes:
• Fully GM assembled long block
• Ignition Coils, Plug Wires and Spark Plugs
• Oil pump, pick-up and wet sump oil pan
• Exhaust Manifolds
• Intake, Injectors and Throttle Body
• High Pressure Fuel Pump (installed)
• 14” Auto Trans Flexplate
• Harmonic Balancer
• Front timing cover
• Aluminum Water Pump
• Oil Filter
• Passenger Side RH Oil Dipstick and Tube

Warranty:
General Motors limited 2 year / 50,000 mile parts & labor warranty. Click on Document tab above for full details.