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Hear it roar
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Parts intended for competition use only*
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Proposition 65 Warning*
Chevrolet Performance Parts L8P Crate Engine

 Big Power, Big Torque

 Big Power, Big Torque

Hear It Roar
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Parts intended for competition use only*
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Proposition 65 Warning*
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Up to

523 hp

Horsepower*
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Up to

543 lb.-ft.

Torque*
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Up to

6,000

Max Rec RPM
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Up to

400 cu. in. (6.6L)

Displacement

L8 Engines

  • L8P

    Hear It Roar

    View Engine

    Heavy-duty power optimized for performance with a racing upgrades.
    Chevrolet Performance Parts L8P Crate Engine

    Hear It Roar

    View Engine

    Heavy-duty power optimized for performance with a racing upgrades.
    L8P

    View L8P

    Tech Specs
    View in 2026 Catalog

    Performance

    Horsepower:

    523 hp @ 5,800 rpm3

    Torque:

    543 lb.-ft. @ 4,600 rpm

    Max Rec RPM:

    6,000

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powder-metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Billet steel hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Intake manifold:

    Composite

    Throttle body:

    87mm diameter (single-bore)

    Engine Basics

    Part Number:

    19541143

    Engine Type:

    Gen V Small Block V-8

    Displacement:

    400 cu. in. (6.6L)

    Block:

    Cast iron with 6-bolt nodular bearing caps

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.065 in. x 3.860 in. (103.25 mm x 98 mm)

    Valve Lift (in):

    .549 intake / .549 exhaust

    Camshaft Duration (@ 0.050 in):

    218° intake / 231° exhaust

    Compression Ratio:

    10.8:1

    Rocker Arm Ratio:

    1.8:1

    Cylinder Head and Valves

    Cylinder Heads:

    Aluminum rectangular port D/I with 59.02cc chambers

    Valve Size (in.):

    2.130 hollow intake / 1.590 sodium-filled exhaust

    Fuel and Ignition

    Fuel delivery:

    High-pressure direct injection

    Ignition system:

    Coil-on-plug

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    523 hp @ 5,800 rpm3

    Torque:

    543 lb.-ft. @ 4,600 rpm3

    Max Rec RPM:

    6,000

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powder-metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Billet steel hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19541143

    Engine Type:

    Gen V Small Block V-8 direct injection spark ignition

    Displacement:

    400 cu. in. (6.6L)

    Block:

    Cast iron with 6-bolt nodular main bearing caps

    Balanced:

    Internal

    Cylinder Heads and Valves

    Cylinder Heads:

    Aluminum rectangular port D/I with 59.02cc chambers

    Valve Size (in.):

    2.130 hollow intake / 1.590 sodium-filled exhaust

    Measurements

    Bore x Stroke:

    4.065 in. x 3.860 in. (103.25 mm x 98 mm)

    Valve Lift (in):

    .549 intake / .549 exhaust

    Camshaft Duration (@.050 in):

    218° intake / 231° exhaust

    Compression Ratio:

    10.8:1

    Rocker Arm Ratio:

    1.8:1

    Fuel and Ignition

    Fuel delivery:

    High-pressure direct injection

    Ignition system:

    Coil-on-plug

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    View in 2026 Catalog

  • L8T

    Hear It Roar

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    Serious trucking power — our largest-displacement direct-injection model.
    Chevrolet Performance Parts L8TCrate Engine

    Hear It Roar

    View Engine

    Serious trucking power — our largest-displacement direct-injection model.
    L8T

    Tech Specs
    View in 2026 Catalog

    Performance

    Horsepower:

    401 hp @ 5,200 rpm3

    Torque:

    464 lb.-ft. @ 4,000 rpm3

    Max Rec RPM:

    5,600

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powder-metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Billet steel hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Intake manifold:

    Composite

    Throttle body:

    87mm diameter (single-bore)

    Engine Basics

    Part Number:

    19541144 (2024+)

    Engine Type:

    Gen V Small Block V-8

    Displacement:

    400 cu. in. (6.6L)

    Block:

    Cast iron with 6-bolt nodular bearing caps

    Available Build Options:

    Also available in Long Block

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.062 in. x 3.860 in.
    (103.25 mm x 98 mm)

    Valve Lift (in):

    .500 intake / .492 exhaust

    Camshaft Duration (@ 0.050 in):

    193° intake / 199° exhaust

    Compression Ratio:

    10.8:1

    Rocker Arm Ratio:

    1.8:1

    Cylinder Head and Valves

    Cylinder Heads:

    Aluminum rectangular port D/I with 59.02cc chambers

    Valve Size (in.):

    2.130 intake / 1.590 exhaust

    Fuel and Ignition

    Fuel delivery:

    Fuel delivery: High-pressure direct injection (2.175 psi / 150 bar)

    Recommended Fuel:

    87 octane

    Ignition system:

    Coil-on-plug

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    401 hp @ 5,200 rpm3

    Torque:

    464 lb.-ft. @ 4,000 rpm3

    Max Rec RPM:

    5,600

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powder-metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Billet steel hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Intake manifold:

    Composite

    Throttle body:

    87mm diameter (single-bore)

    Engine Basics

    Part Number:

    19541144 (2024+)

    Engine Type:

    Gen V Small Block V8 direct injection spark ignition

    Displacement:

    400 cu. in. (6.6L)

    Block:

    Cast iron with 6-bolt nodular bearing caps

    Available Build Options:

    Also available in Long Block

    Balanced:

    Internal

    Cylinder Heads and Valves

    Cylinder Heads:

    Aluminum rectangular port D/I with 59.02cc chambers

    Valve Size (in.):

    2.130 hollow intake / 1.590 sodium-filled exhaust

    Measurements

    Bore x Stroke:

    4.062 in. x 3.860 in.

    Valve Lift (in):

    .500 intake / .492 exhaust

    Camshaft Duration (@.050 in):

    193° intake / 199° exhaust

    Compression Ratio:

    10.8:1

    Rocker Arm Ratio:

    1.8:1

    Fuel and Ignition

    Fuel delivery:

    Fuel delivery: High-pressure direct injection (2.175 psi / 150 bar)

    Recommended Fuel:

    87 octane

    Ignition system:

    Coil-on-plug

    Reluctor Wheel:

    58x

    View in 2026 Catalog

L8P: Modern Technology for Vintage Vehicles

With a high-performance camshaft, high-flow heads, and a forged crankshaft helping push it to 523 hp and 543 lb.-ft. of torque, the L8P 6.6L crate engine is a modern powerhouse for vintage builds of all types.

1967 Chevrolet C10
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A Close-up View Behind the Steering Wheel of Gauges in a 1967 Chevrolet C10.
    Explore Custom Build
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Decades of Building Performance

A look back at the LS, LSX, and LT Engine Family Histories.

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2025 HOT ROD Power Tour

Chevy Performance cruises the Heartland for 31st annual high-performance road trip

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Engine & Transmission Packages
Engine & Transmission Packages

Factory-matched Connect & Cruise* engine-and-transmission
combinations that deliver.
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"It simplifies the whole project. If you have any issues, you plug into it, and you work on it and go from there. It makes it so simple."

Talbert Goldman
Mike Goldman Customs

Assemble the Dream Powertrain System

Compatible transmissions and components for L8P models.

Build confidently with Chevrolet Performance installation guides.

L8P tbd

L8T tbd

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