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

LS with an Iron Block Foundation

LS with an Iron Block Foundation
Locate a Dealer
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Parts intended for competition use only*
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Proposition 65 Warning*
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Up to

627 hp

Horsepower*
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Up to

586 lb.-ft.

Torque*
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Up to

7,100

Max Rec RPM
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Up to

454 cu. in. (7.4L)

Displacement
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Up to

627 hp

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

Up to

586 lb.-ft.

Torque*
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Up to

7,100

Max Rec RPM
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Up to

454 cu. in. (7.4L)

Displacement

LSX Engine

  • LSX376-B15

    The ideal foundation for turbocharged or supercharged combinations.
    Chevrolet Performance Parts LSX Crate Engine

    View LSX376-B15

    The ideal foundation for turbocharged or supercharged combinations.
    fpo

    View LSX376-B15

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    473 hp @ 6,000 rpm

    Torque:

    444 lb.-ft. @ 5,000 rpm

    Max Rec RPM:

    6,600

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powder metal

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19417356

    Engine Type:

    LSX-Series Gen IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    LSX cast iron with 6-bolt, cross-bolted main caps

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.065 x 3.622 (103.25 x 92 mm)

    Valve Lift (in):

    .560 intake / .555 exhaust

    Camshaft Duration (@ .050 in):

    210° intake / 230° exhaust

    Compression Ratio:

    9.0:1

    Rocker Arm Ratio:

    1.7:1

    Cylinder Head and Valves

    Cylinder Heads:

    LSX-LS3 rectangular port; with “as-cast” 68cc chambers and a 6-bolt attachment

    Valve Size (in.):

    2.160 intake / 1.550 exhaust

    Fuel and Ignition

    Recommended Fuel:

    Regular pump

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    473 hp @ 6,000 rpm

    Torque:

    444 lb.-ft. @ 5,000 rpm

    Max Rec RPM:

    6,600

    Engine Basics

    Part Number:

    19417356

    Engine Type:

    LSX-Series Gen IV Small-Block V-8

    Displacement:

    376 cu. in. (6.2L)

    Block:

    LSX cast iron with 6-bolt, cross-bolted main caps

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.065 x 3.622 (103.25 x 92 mm)

    Valve Lift (in):

    .560 intake / .555 exhaust

    Camshaft Duration (@ .050 in):

    210° intake / 230° exhaust

    Compression Ratio:

    9.0:1

    Rocker Arm Ratio:

    1.7:1

    Internal Components

    Crankshaft:

    Forged steel

    Connecting Rods:

    Forged powder metal

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Cylinder Head and Valves

    Cylinder Heads:

    LSX-LS3 rectangular port; with “as-cast” 68cc chambers and a 6-bolt attachment

    Valve Size (in.):

    2.160 intake / 1.550 exhaust

    Fuel and Ignition

    Recommended Fuel:

    Regular pump

    Reluctor Wheel:

    58x
    #/#
    View in 2025 Catalog

  • LSX454

    Torque like a big block, compact with fiery power from a small block.
    Chevrolet Performance Parts LSX 454 Crate Engine

    View LSX454

    Torque like a big block, compact with fiery power from a small block.
    fpo

    View LSX454

    Tech Specs
    View in 2025 Catalog

    Performance

    Horsepower:

    627 hp @ 6,300 rpm

    Torque:

    586 lb.-ft. @ 5,100 rpm

    Max Rec RPM:

    7,100

    Internal Components

    Crankshaft:

    4340 forged steel with 8-bolt flange

    Connecting Rods:

    4340 forged steel

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller

    Rocker Arms:

    Investment-cast, roller trunnion

    Engine Basics

    Part Number:

    19417357

    Engine Type:

    LSX-Series Gen IV Small-Block V-8

    Displacement:

    454 cu. in. (7.4L)

    Block:

    LSX cast iron with 6-bolt, cross-bolted main caps

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.185 in. x 4.125 in. (106.3 x 104.8 mm)

    Valve Lift (in):

    .648 intake / .648 exhaust

    Camshaft Duration (@ .050 in):

    236° intake / 246° exhaust

    Compression Ratio:

    11.0:1

    Rocker Arm Ratio:

    1.8:1

    Cylinder Head and Valves

    Cylinder Heads:

    Aluminum LSX-LS7 port; with “as cast” 70cc chambers

    Valve Size (in.):

    2.200 titanium intake / 1.610 hollow, sodium-filled exhaust

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel:

    58x

    Show Less

    Locate a Dealer

    Tech Specs

    Performance

    Horsepower:

    627 hp @ 6,300 rpm

    Torque:

    586 lb.-ft. @ 5,100 rpm 

    Max Rec RPM:

    7,100 

    Engine Basics

    Part Number:

    19417357 

    Engine Type:

    LSX-Series Gen IV Small-Block V-8 

    Displacement:

    454 cu. in. (7.4L) 

    Block:

    LSX cast iron with 6-bolt, cross-bolted main caps 

    Balanced:

    Internal

    Measurements

    Bore x Stroke:

    4.185 in. x 4.125 in. (106.3 x 104.8 mm) 

    Valve Lift (in):

    .648 intake / .648 exhaust 

    Camshaft Duration (@ .050 in):

    236° intake / 246° exhaust 

    Compression Ratio:

    11.0:1 

    Rocker Arm Ratio:

    1.8:1

    Internal Components

    Crankshaft:

    4340 forged steel with 8-bolt flange 

    Connecting Rods:

    4340 forged steel 

    Pistons:

    Forged aluminum

    Camshaft Type:

    Hydraulic roller 

    Rocker Arms:

    Investment-cast, roller trunnion 

    Cylinder Head and Valves

    Cylinder Heads:

    Aluminum LSX-LS7 port; with “as cast” 70cc chambers 

    Valve Size (in.):

    2.200 titanium intake / 1.610 hollow, sodium-filled exhaust 

    Fuel and Ignition

    Recommended Fuel:

    Premium pump

    Reluctor Wheel: 

    58x
    #/#
    View in 2025 Catalog

#LSSWAPTHEWORLD

Stories from iconic builders and their LSX-inspired builds.

“

[The LSX] was competitive so we . . . started bringing it to the events."

Mike Maciejack 

“Ruckus” 1987 Chevrolet R10 
Mike Maciejack Stands in Front of a Chevy Pickup Truck on a Racetrack

“

This one’s fun because it’s just pure American muscle."

Brad & Doug DeBerti

“C10 Slayer” 1965 Chevrolet C10
Two Men Pose in Front of a Chevy Vehicle at a Trade Show

“

I wanted to pay tribute to what it was, but in a modern way."

Jimmy & Jim Miller  

1981 Pontiac Firebird Trans Am  
Two Men Pose in Front of a Yellow Chevy Sports Car
#/#
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Decades of Building Performance

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

View Timeline
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Featured Event

The Best Engines of Holley LS Fest East 2024
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Engine & Transmission Packages

Factory-matched Connect & Cruise* engine-and-transmission
combinations that deliver.
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A Chevrolet Performance Parts Connect and Cruise Powertrain System
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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 LSX models.

Build confidently with Chevrolet Performance installation guides.

LSX376-B15

LSX454

Find dealers ready to help you with Chevrolet Performance Parts.
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