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Owner's Support

Parts intended for competition use only*

Proposition 65 Warning*

Chevrolet Performance Parts LT1 Crate Engine

Next-Gen Small-Block

Locate a Dealer

Parts intended for competition use only*

Proposition 65 Warning*

Up to

455 hp

Horsepower*

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

Up to

455 lb.-ft.

Torque*

Up to

6,600

Max Recommended RPM

Up to

376 cu. in. (6.2L)

Displacement

LT1 Engines

LT1

Old-school muscle with a high-tech heart transplant for balanced power.

View LT1

Old-school muscle with a high-tech heart transplant for balanced power.

View LT1

Tech Specs

View in 2025 Catalog

Performance

Horsepower:

455 hp @ 6,000 rpm*

Torque:

455 lb.-ft. @ 4,400 rpm*

Max Rec RPM:

6,600

Internal Components

Crankshaft:

Forged steel

Connecting Rods:

Forged powdered metal

Pistons:

Hypereutectic aluminum

Camshaft Type:

Billet steel roller

Rocker Arms:

Investment-cast, roller bearing trunnion

Engine Basics

Part Number:

19431953

Engine Type:

Direct Injection spark-ignition 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.

Valve Lift (in):

0.550 intake / 0.522 exhaust

Camshaft Duration (@0.050 in):

242° intake / 244° exhaust

Compression Ratio:

11.5:1

Rocker Arm Ratio:

1.81:1

Cylinder Head and Valves

Cylinder Heads:

Aluminum rectangular port D/I

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:

455 hp @ 6,000 rpm*

Torque:

455 lb.-ft. @ 4,400 rpm*

Max Rec RPM:

6,600

Engine Basics

Part Number:

19431953

Engine Type:

Direct Injection spark-ignition 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.

Valve Lift (in):

0.550 intake / 0.522 exhaust

Camshaft Duration (@ 0.050 in):

242° intake / 244° exhaust

Compression Ratio:

11.5:1

Rocker Arm Ratio:

1.81:1

Internal Components

Crankshaft:

Forged steel

Connecting Rods:

Forged powdered metal

Pistons:

Hypereutectic aluminum

Camshaft Type:

Billet steel roller

Rocker Arms:

Investment-cast, roller bearing trunnion

Cylinder Head and Valves

Cylinder Heads:

Aluminum rectangular port D/I

Valve Size (in.):

2.130 intake / 1.590 exhaust

Fuel and Ignition

Recommended Fuel:

Premium pump

Reluctor Wheel:

58x

#/#

View in 2025 Catalog
LT1 E-ROD

All the power of the LT1 in a street-legal package.

View LT1 E-ROD

All the power of the LT1 in a street-legal package.

View LT1 E-ROD

Tech Specs

View in 2025 Catalog

Performance

Horsepower:

455 hp @ 6,000 rpm*

Torque:

455 lb.-ft. @ 4,400 rpm*

Max Rec RPM:

6,600

Internal Components

Crankshaft:

Forged steel

Connecting Rods:

Forged powdered metal

Pistons:

Hypereutectic aluminum

Camshaft Type:

Billet steel roller

Rocker Arms:

Investment-cast, roller bearing trunnion

Engine Basics

Part Number:

19431953

Engine Type:

Direct Injection spark-ignition 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.

Valve Lift (in):

0.550 intake / 0.522 exhaust

Camshaft Duration (@0.050 in):

242° intake / 244° exhaust

Compression Ratio:

11.5:1

Rocker Arm Ratio:

1.81:1

Cylinder Head and Valves

Cylinder Heads:

Aluminum rectangular port D/I

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:

455 hp @ 6,000 rpm*

Torque:

455 lb.-ft. @ 4,400 rpm*

Max Rec RPM:

6,600

Engine Basics

Part Number:

19431953

Engine Type:

Direct Injection spark-ignition 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.

Valve Lift (in):

0.550 intake / 0.522 exhaust

Camshaft Duration (@ 0.050 in):

242° intake / 244° exhaust

Compression Ratio:

11.5:1

Rocker Arm Ratio:

1.81:1

Internal Components

Crankshaft:

Forged steel

Connecting Rods:

Forged powdered metal

Pistons:

Hypereutectic aluminum

Camshaft Type:

Billet steel roller

Rocker Arms:

Investment-cast, roller bearing trunnion

Cylinder Head and Valves

Cylinder Heads:

Aluminum rectangular port D/I

Valve Size (in.):

2.130 intake / 1.590 exhaust

Fuel and Ignition

Recommended Fuel:

Premium pump

Reluctor Wheel:

58x

#/#

View in 2025 Catalog

LT1 Engine Custom Builds

#LSSWAPTHEWORLD

Stories from iconic builders and their LT1-inspired builds.

_“

It’s classic . . . with that modern drivetrain in an old truck.”

Shay Brummer

1955 Chevrolet First Series Pickup

_“

[Our Nomad] drives like a new Chevy now.”

Louie & Laurie Fesmire

1955 Chevrolet Bel Air Nomad

Louie and Laurie Fesmire Posing in Front of a Chevy Car with an Open Hood

_“

This car has stood the test of time.” 

Barry Blomquist

1964 Corvette Stingray

_“

It was kind of a no-brainer to have a . . . more modern motor in it.”

Jamison & Lauren Johnson

1967 Chevelle Malibu

A Man and a Woman Stand Smiling in Front of a Chevy Car During Sunset

#/#

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

Close-up of Under a Vehicle's Front Hood Displaying the Engine with an Orange Top in the Middle

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 LT1 models.

LT1 Engine Control Module

LT1 Wet Sump Hydraulic Power Steering Kit

See All Components
SuperMatic® 4L70-E 4-Speed Automatic

SuperMatic® 6L80-E 6-Speed Automatic

SuperMatic® 8L90-E 8-Speed Automatic

See All Transmissions