L8P Crate Engines | Chevrolet Performance Parts

Performance Parts

LT Engines LS/LSX Engines Small Block Engines Big Block Engines eCrate All Crate Engines Engine & Transmission Packages Racing Engines

Transmissions

Components Vehicle Upgrades All Parts

Where To Buy

Owner's Support

Hear it roar

Parts intended for competition use only*

Proposition 65 Warning*

Chevrolet Performance Parts L8P Crate Engine

$750 rebate* on Chevrolet Performance LT1, L8T, and L8P Crate Engines* or $250 rebate* on the Chevrolet Performance L8T Long Block.

Get Offer

Big Power, Big Torque

Hear It Roar

Locate a Dealer

Parts intended for competition use only*

Proposition 65 Warning*

Up to

523 hp

Horsepower*

Two Yellow Gears Slightly Apart with an Arrow Pointing at a Curve from the Left One to the Other

Up to

543 lb.-ft.

Torque*

Up to

6,000

Max Rec RPM

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.

Hear It Roar

View Engine

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

View L8P

Tech Specs

View in 2025 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:

19435523

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 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:

19435523

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 2025 Catalog
L8T

Hear It Roar

View Engine

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

Hear It Roar

View Engine

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

Tech Specs

View in 2025 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:

19435733 (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

Measurements

Bore x Stroke:

4.062 in. x 3.860 in.

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:

19435733 (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 2025 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.