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Parts intended for competition use only*
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Proposition 65 Warning*
Chevrolet Performance Parts LS3 Crate Engine

Gen IV LS Power

Hear It Roar
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

638 hp

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

Up to

604 lb.-ft.

Torque*
A Yellow Speedometer Icon

Up to

6,800

Max Rec RPM
A Yellow Displacement Icon

Up to

376 cu. in. (6.2L)

Displacement

LS3 Engines

  • LS3

    Hear It Roar

    View Engine

    The trusted, rugged and reliable choice — with plenty of torque and horsepower.
    Chevrolet Performance Parts LS376/525 Crate Engine

    Hear It Roar

    View Engine

    The trusted, rugged and reliable choice — with plenty of torque and horsepower.

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    430 hp @ 5,900 rpm

    Torque:

    425 lb.-ft. @ 4,600 rpm

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19540155

    Engine Type:

    LS-Series Gen-IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast aluminum with 6-bolt, cross-bolted main caps

    Available Build Options:

    Also available in Long Block

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

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

    Valve Lift (in):

    .551 intake / .522 exhaust

    Camshaft Duration (@.050 in):

    204° intake / 211° exhaust

    Compression Ratio:

    10.7:1

    Rocker Arm Ratio:

    1.7:1

    Cylinder Head and Valves

    Cylinder Heads:

    Aluminum L92-style port; as-cast with 68cc chambers

    Valve Size (in.):

    2.165 intake / 1.590 exhaust

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    430 hp @ 5,900 rpm

    Torque:

    425 lb.-ft. @ 4,600 rpm

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19540155

    Engine Type:

    LS-Series Gen-IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast aluminum with 6-bolt, cross-bolted main caps

    Available Build Options:

    Also available in Long Block

    Balanced:

    Internal

    Cylinder Heads and Valves

    Cylinder Heads:

    Aluminum L92-style port; as-cast with 68cc chambers

    Valve Size (in.):

    2.165 intake / 1.590 exhaust

    Measurements

    Bore x Stroke:

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

    Valve Lift (in):

    .551 intake / .522 exhaust

    Camshaft Duration (@.050 in):

    204° intake / 211° exhaust

    Compression Ratio:

    10.7:1

    Rocker Arm Ratio:

    1.7:1

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    View in 2025 Catalog

  • LS364/450

    View Engine

    A popular builder's choice — LS6 camshaft and aluminum cylinder heads.

    Chevrolet Performance Parts LS364/450 Crate Engine

    View Engine

    A popular builder's choice — LS6 camshaft and aluminum cylinder heads.

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    452 hp @ 5,600 rpm

    Torque:

    441 lb.-ft. @ 4,800 rpm

    Max Rec RPM:

    6,800

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    LS6 hydraulic roller

    Rocker Arms:

    Investment-cast, roller bearing trunnion

    Engine Basics

    Part Number:

    19434650

    Engine Type:

    Performance LQ9 long-block

    Displacement:

    364 cu. in. (6.0L)

    Block:

    Cast iron with 6-bolt block, cross-bolted main caps

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.000 x 3.622 in (101.6 x 92 mm)

    Valve Lift (in):

    .550 intake / .550 exhaust

    Camshaft Duration (@.050 in):

    204° intake / 218° exhaust

    Compression Ratio:

    10.3:1 (nominal)

    Rocker Arm Ratio:

    1.7:1

    Cylinder Head and Valves

    Cylinder Heads:

    LS3 rectangular port; aluminum, as-cast with 68cc chambers

    Valve Size (in.):

    2.165 intake (hollow stem)
    1.590 exhaust (solid stem)

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    24Xe

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    452 hp @ 5,600 rpm

    Torque:

    441 lb.-ft. @ 4,800 rpm

    Max Rec RPM:

    6,800

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    LS6 hydraulic roller

    Rocker Arms:

    Investment-cast, roller bearing trunnion

    Engine Basics

    Part Number:

    19434650

    Engine Type:

    Performance LQ9 long-block

    Displacement:

    364 cu. in. (6.0L)

    Block:

    Cast iron with 6-bolt block, cross-bolted main caps

    Balanced:

    Internal

    Cylinder Heads and Valves

    Cylinder Heads:

    LS3 rectangular port; aluminum, as-cast with 68cc chambers

    Valve Size (in.):

    2.165 intake (hollow stem)
    1.590 exhaust (solid stem)

    Measurements

    Bore x Stroke:

    4.000 x 3.622 in (101.6 x 92 mm)

    Valve Lift (in):

    .550 intake / .550 exhaust

    Camshaft Duration (@.050 in):

    204° intake / 218° exhaust

    Compression Ratio:

    10.3:1 (nominal)

    Rocker Arm Ratio:

    1.7:1

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    24Xe

    View in 2025 Catalog

  • LS376/480

    View Engine

    A hot, racing-inspired camshaft on the LS3 — the best of both worlds.

    Chevrolet Performance Parts LS376/480 Crate Engine

    View Engine

    A hot, racing-inspired camshaft on the LS3 — the best of both worlds.

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    495 hp @ 6,200 rpm

    Torque:

    473 lb.-ft. @ 5,000 rpm

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19540156

    Engine Type:

    LS-Series Gen-IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast-aluminum with 6-bolt block, cross-bolted main caps

    Available Build Options:

    Also available in Long Block

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

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

    Valve Lift (in):

    .525 intake / .525 exhaust

    Camshaft Duration (@.050 in):

    219° intake / 228° exhaust

    Compression Ratio:

    10.7:1

    Rocker Arm Ratio:

    1.7:1

    Cylinder Head and Valves

    Cylinder Heads:

    Aluminum L92-style port; as-cast with 68cc chambers

    Valve Size (in.):

    2.165 intake / 1.590 exhaust

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    495 hp @ 6,200 rpm

    Torque:

    473 lb.-ft. @ 5,000 rpm

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19540156

    Engine Type:

    LS-Series Gen-IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast-aluminum with 6-bolt block, cross-bolted main caps

    Available Build Options:

    Also available in Long Block

    Balanced:

    Internal

    Cylinder Heads and Valves

    Cylinder Heads:

    Aluminum L92-style port; as-cast with 68cc chambers

    Valve Size (in.):

    2.165 intake / 1.590 exhaust

    Measurements

    Bore x Stroke:

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

    Valve Lift (in):

    .525 intake / .525 exhaust

    Camshaft Duration (@.050 in):

    219° intake / 228° exhaust

    Compression Ratio:

    10.7:1

    Rocker Arm Ratio:

    1.7:1

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    View in 2025 Catalog

  • LS376/515

    View Engine

    Pure muscle with a proven track record — designed to pair with carburetor models.

    Chevrolet Performance Parts LS376/515 Crate Engine

    View Engine

    Pure muscle with a proven track record — designed to pair with carburetor models.

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    533 hp @ 6,600 rpm

    Torque:

    477 lb.-ft. @ 5,200 rpm

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19435102

    Engine Type:

    LS-Series Gen-IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast-aluminum with 6-bolt block, cross-bolted main caps

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.065 in. x 3.622 in.

    Valve Lift (in):

    .525 intake / .525 exhaust

    Camshaft Duration (@.050 in):

    226° intake / 236° exhaust

    Compression Ratio:

    10.7:1

    Rocker Arm Ratio:

    1.7:1

    Cylinder Head and Valves

    Cylinder Heads:

    Aluminum L92-style port; as-cast with 68cc chambers

    Valve Size (in.):

    2.165 intake / 1.590 exhaust

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    533 hp @ 6,600 rpm

    Torque:

    477 lb.-ft. @ 5,200 rpm

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19435102

    Engine Type:

    LS-Series Gen-IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast-aluminum with 6-bolt block, cross-bolted main caps

    Balanced:

    Internal

    Cylinder Heads and Valves

    Cylinder Heads:

    Aluminum L92-style port; as-cast with 68cc chambers

    Valve Size (in.):

    2.165 intake / 1.590 exhaust

    Measurements

    Bore x Stroke:

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

    Valve Lift (in):

    .525 intake / .525 exhaust

    Camshaft Duration (@.050 in):

    226° intake / 236° exhaust

    Compression Ratio:

    10.7:1

    Rocker Arm Ratio:

    1.7:1

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    View in 2025 Catalog

  • LS376/525

    Hear It Roar

    View Engine

    LS3 treated with an ASA camshaft for an engine that thrives in high rpm.
    Chevrolet Performance Parts LS376/525 Crate Engine

    Hear It Roar

    View Engine

    LS3 treated with an ASA camshaft for an engine that thrives in high rpm.

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    525 hp @ 6,200 rpm

    Torque:

    486 lb.-ft. @ 5,200 rpm

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19540157

    Engine Type:

    LS-Series Gen-IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast-aluminum with 6-bolt block, cross-bolted main caps

    Available Build Options:

    Also available in Long Block

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.065 in. x 3.622 in.

    Valve Lift (in.):

    .525 intake / .525 exhaust

    Camshaft Duration (@.050 in):

    226° intake / 236° exhaust

    Compression Ratio:

    10.7:1

    Rocker Arm Ratio:

    1.7:1

    Cylinder Head and Valves

    Cylinder Heads:

    Aluminum L92-style port; as-cast with 68cc chambers

    Valve Size (in):

    2.165 intake / 1.590 exhaust

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    525 hp @ 6,200 rpm

    Torque:

    486 lb.-ft. @ 5,200 rpm

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19540157

    Engine Type:

    LS-Series Gen-IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast-aluminum with 6-bolt block, cross-bolted main caps

    Available Build Options:

    Also available in Long Block

    Balanced:

    Internal

    Cylinder Heads and Valves

    Cylinder Heads:

    Aluminum L92-style port; as-cast with 68cc chambers

    Valve Size (in.):

    2.165 intake / 1.590 exhaust

    Measurements

    Bore x Stroke:

    4.065 in. x 3.622 in.

    Valve Lift (in):

    .525 intake / .525 exhaust

    Camshaft Duration (@.050 in):

    226° intake / 236° exhaust

    Compression Ratio:

    10.7:1

    Rocker Arm Ratio:

    1.7:1

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    View in 2025 Catalog

  • LS9 Long Block

    View Engine

    The foundation for the supercharged Gen VI Corvette — ready to be customized.
    A Chevrolet Performance Parts LS9 Crate Engine

    View Engine

    The foundation for the supercharged Gen VI Corvette — ready to be customized.
    fpo

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    638 hp @ 6,500 rpm

    Torque:

    604 lb.-ft. @ 3,800 rpm

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Forged steel with nine-bolt flange

    Connecting Rods:

    Forged titanium

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    12624262

    Engine Type:

    LS-Series Gen-IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast-aluminum with 6-bolt block, cross-bolted main caps

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.065 in. x 3.622 in.

    Valve Lift (in.):

    .562 intake / .558 exhaust

    Camshaft Duration (@.050 in):

    211° intake / 230° exhaust

    Compression Ratio:

    9.1:1

    Rocker Arm Ratio:

    1.7:1

    Cylinder Head and Valves

    Cylinder Heads:

    Aluminum L92-style port; as-cast with 68cc chambers

    Valve Size (in):

    2.160 titanium intake / 1.590 hollow, sodium-filled exhaust

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    638 hp @ 6,500 rpm

    Torque:

    604 lb.-ft. @ 3,800 rpm

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Forged steel with nine-bolt flange

    Connecting Rods:

    Forged titanium

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    12624262

    Engine Type:

    LS-Series Gen-IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    Cast-aluminum with 6-bolt block, cross-bolted main caps

    Balanced:

    Internal

    Cylinder Heads and Valves

    Cylinder Heads:

    Aluminum L92-style port; as-cast with 68cc chambers

    Valve Size (in.):

    2.160 titanium intake / 1.590 hollow, sodium-filled exhaust

    Measurements

    Bore x Stroke:

    4.065 in. x 3.622 in.

    Valve Lift (in):

    .562 intake / .558 exhaust

    Camshaft Duration (@.050 in):

    211° intake / 230° exhaust

    Compression Ratio:

    9.1:1

    Rocker Arm Ratio:

    1.7:1

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    View in 2025 Catalog

LS3 Engine Custom Builds

#LSSWAPTHEWORLD

Stories from iconic builders and their LS3-inspired builds.

"

If those guys can do it, I can.”

Dwight Ward

1971 GMC C15
Dwight Ward Faces the Camera while Standing Outside

"

I love the horsepower and it’s a plug-and-play setup.”

Troy & Camryn Schindler

“Black Haze” 1967 Camaro
Two Men in Black T-Shirts, Shades, and Ballcaps Stand Outside

"

Those LS engines are so dependable and there’s lots of power”

Ronnie & Tina Allen

“Bruzer” 1972 C10
Ronnie and Tina Allen at an Empty Racetrack

"

It has the reliability of a new engine and performs much better.”

Don Milligan & Greg Folino

1969 Corvette
Don Milligan and Greg Folino Standing Outside
#/#
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

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 LS3 models.

Build confidently with Chevrolet Performance installation guides.

LS3 tbd

LS3

LS376/480 tbd

LS376/515 tbd

LS376/525 tbd

LS9 tbd

LS3 tbd

LS3

LS376/480 tbd

LS376/515 tbd

LS376/525 tbd

LS9 tbd

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