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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

Hear It Roar
Locate a Dealer

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

6,600

Max Rec RPM
A Yellow Displacement Icon

Up to

376 cu. in. (6.2L)

Displacement

LT4 Engines

  • LT4

    View Engine

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

    Hear It Roar

    View Engine

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

    Tech Specs
    View in 2026 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

    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

    Cylinder Heads and Valves

    Cylinder Heads:

    A356T6 Rotocast aluminum; as cast with 65.5cc chambers

    Valve Size (in.):

    2.130 intake / 1.590 exhaust

    Measurements

    Bore x Stroke:

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

    Valve Lift (in):

    .492 intake / .551 exhaust

    Camshaft Duration (@.050 in):

    189° intake / 223° exhaust

    Compression Ratio:

    10:1

    Rocker Arm Ratio:

    1.81:1

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x
    View in 2026 Catalog

  • LT4 E-ROD

    View Engine

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

    View Engine

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

    Tech Specs
    View in 2026 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

    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

    Cylinder Heads and Valves

    Cylinder Heads:

    A356T6 Rotocast aluminum; as cast with 65.5cc chambers

    Valve Size (in.):

    2.130 intake / 1.590 exhaust

    Measurements

    Bore x Stroke:

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

    Valve Lift (in):

    .492 intake / .551 exhaust

    Camshaft Duration (@.050 in):

    189° intake / 223° exhaust

    Compression Ratio:

    10:1

    Rocker Arm Ratio:

    1.81:1

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x
    View in 2026 Catalog
LT4 Custom Build Gallery

#LSSWAPTHEWORLD

Inspired builders and their LT4-powered projects.

“

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

David Kinnison

1957 Chevrolet 3100
fpo

“

The Connect & Cruise package is phenomenal”

Darrell Cimbanin

1958 Chevrolet Apache
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

“

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

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 LT4 models.

Build confidently with Chevrolet Performance installation guides.

LT4

LT4 E-ROD

Find dealers ready to help you with Chevrolet Performance Parts.
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