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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

Gen IV LS Power

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

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

    Chevrolet Performance Parts LS376/525 Crate Engine

    View LS3

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

    View LS3

    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

    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

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    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

    View in 2025 Catalog

  • LS364/450

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

    Chevrolet Performance Parts LS364/450 Crate 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

    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

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    LS6 hydraulic roller

    Rocker Arms:

    Investment-cast, roller bearing trunnion

    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

    View in 2025 Catalog

  • LS376/480

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

    Chevrolet Performance Parts LS376/480 Crate 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

    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

    Internal Components

    Crankshaft:

    Nodular iron

    Connecting Rods:

    Powdered metal

    Pistons:

    Hypereutectic aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    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

    View in 2025 Catalog

  • LS376/515

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

    Chevrolet Performance Parts LS376/515 Crate 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

    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):