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Parts intended for competition use only*
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Proposition 65 Warning*
Chevrolet Performance Parts LT4 Crate Engine

Classic Muscle, Modernized

Classic Muscle, Modernized
Locate a Dealer
A Black and White Checkered Flag Against a Yellow Background in a Circle

Parts intended for competition use only*
A Yellow Triangle with an Exclamation Point in the Center

Proposition 65 Warning*
A Yellow Horsepower Icon

Up to

650 hp

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

Up to

650 lb.-ft.

Torque*
A Yellow Speedometer Icon

Up to

6,000

Max Rec RPM
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Up to

376 cu. in. (6.2L)

Displacement

LT4 Engines

  • LT4

    Supercharged LT1 designed to support higher output and cylinder pressures.
    Chevrolet Performance Parts LT4 Crate Engine

    View LT4

    Supercharged LT1 designed to support higher output and cylinder pressures.
    fpo

    View LT4

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    650 hp @ 6,400 rpm*

    Torque:

    650 lb.-ft. @ 3,600 rpm*

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powdered-metal steel 

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller bearing trunnion

    Engine Basics

    Part Number:

    19431955

    Engine Type:

    Gen-V Small-Block V8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast aluminum with 6-bolt nodular iron main bearing caps

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.065 in. x 3.622 in. (103.25 x 92mm)

    Valve Lift (in):

    .492 intake / .551 exhaust

    Camshaft Duration (@0.050 in):

    189° intake / 223° exhaust

    Compression Ratio:

    10:1

    Rocker Arm Ratio:

    1.81:1

    Cylinder Head and Valves

    Cylinder Heads:

    A356T6 Rotocast aluminum; as cast with 65.5cc chambers

    Valve Size (in.):

    2.130 intake / 1.590 exhaust

    Fuel and Ignition

    Recommended Fuel: 

    Premium pump 

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    650 hp @ 6,400 rpm*

    Torque:

    650 lb.-ft. @ 3,600 rpm*

    Max Rec RPM:

    6,600

    Engine Basics

    Part Number:

    19431955

    Engine Type:

    Gen-V Small-Block V8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast aluminum with 6-bolt nodular iron main bearing caps

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.065 in. x 3.622 in. (103.25 x 92mm)

    Valve Lift (in):

    .492 intake / .551 exhaust

    Camshaft Duration (@ 0.050 in):

    189° intake / 223° exhaust

    Compression Ratio:

    10:1

    Rocker Arm Ratio:

    1.81:1

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powdered-metal steel 

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller bearing trunnion

    Cylinder Head and Valves

    Cylinder Heads:

    A356T6 Rotocast aluminum; as cast with 65.5cc chambers

    Valve Size (in.):

    2.130 intake / 1.590 exhaust

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x
    View in 2025 Catalog

  • LT4 E-ROD

    All the power and fight of the LT4 in a street-legal package.
    Chevrolet Performance Parts LT4 E-Rod Crate Engine

    View LT4-E-ROD

    All the power and fight of the LT4 in a street-legal package.
    fpo

    View LT4-E-ROD

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    650 hp @ 6,400 rpm*

    Torque:

    650 lb.-ft. @ 3,600 rpm*

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powdered-metal steel 

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller bearing trunnion

    Engine Basics

    Part Number:

    19431955

    Engine Type:

    Gen-V Small-Block V8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast aluminum with 6-bolt nodular iron main bearing caps

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.065 in. x 3.622 in. (103.25 x 92mm)

    Valve Lift (in):

    .492 intake / .551 exhaust

    Camshaft Duration (@0.050 in):

    189° intake / 223° exhaust

    Compression Ratio:

    10:1

    Rocker Arm Ratio:

    1.81:1

    Cylinder Head and Valves

    Cylinder Heads:

    A356T6 Rotocast aluminum; as cast with 65.5cc chambers

    Valve Size (in.):

    2.130 intake / 1.590 exhaust

    Fuel and Ignition

    Recommended Fuel: 

    Premium pump 

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    650 hp @ 6,400 rpm*

    Torque:

    650 lb.-ft. @ 3,600 rpm*

    Max Rec RPM:

    6,600

    Engine Basics

    Part Number:

    19431955

    Engine Type:

    Gen-V Small-Block V8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast aluminum with 6-bolt nodular iron main bearing caps

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.065 in. x 3.622 in. (103.25 x 92mm)

    Valve Lift (in):

    .492 intake / .551 exhaust

    Camshaft Duration (@ 0.050 in):

    189° intake / 223° exhaust

    Compression Ratio:

    10:1

    Rocker Arm Ratio:

    1.81:1

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powdered-metal steel 

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller bearing trunnion

    Cylinder Head and Valves

    Cylinder Heads:

    A356T6 Rotocast aluminum; as cast with 65.5cc chambers

    Valve Size (in.):

    2.130 intake / 1.590 exhaust

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x
    View in 2025 Catalog
LT4 Custom Build Gallery

#LSSWAPTHEWORLD

Stories from iconic builders and their LT4-inspired builds.

“

The LT4 creates a lot of horsepower and the response is just amazing.”

David Kinnison

1957 Chevrolet 3100
fpo

“

I don't think there's anything else I'd rather have.”

Scotty Hooper & Paul Atkins

1958 Corvette
Scotty Hooper and Paul Atkins Pose in Front of a Vintage Chevy Car

“

They did an amazing job; this is really an unsung hero.” 

Mitch Dixon

1996 Greenwood Corvette
Mitch Dixon Stands in Front of a Red Chevrolet Sports Car

“

We have had just nothing but enjoyment from [the LT4]."

Mark Allen

1967 Camaro
Mark Allen and Chris Greener Stand in Next to a Blue Chevy Car
Overhead View of Engineers in White Lab Coats Look at an Engine

Decades of Building Performance

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

View Timeline
View of a Chevrolet Performance Parts Crate Engine with a Red Paintjob on Top Housed in a Red GM Vehicle's Engine Bay

Featured Event

The Best Engines of Holley LS Fest East 2024
Learn More

Engine & Transmission Packages

Factory-matched Connect & Cruise* engine-and-transmission combinations that deliver.
Learn More
A Chevrolet Performance Parts Connect and Cruise Powertrain System
A Close-up Photo of Talbert Goldman Wearing Shades and a Baseball Cap

"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 LT4 models.

Build confidently with Chevrolet Performance installation guides.

LT4

LT4 E-ROD

Find dealers ready to help you with Chevrolet Performance Parts.
Locate a Dealer
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