LSX CRATE ENGINES

Chevrolet Performance’s LSX crate engines take LS power to the next level, with racing-engineered combinations that deliver power with strength for your custom car. The LSX series of crate engines are based on the LSX Bowtie Block and use a number of production-based and LSX high-performance parts to deliver ultimate performance engines that were never offered in production vehicles. See how this Chevy engine family measures up with comparisons of horsepower, torque, and other technical specifications.

LSX376-B15

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LSX376-B8

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LSX454

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Part Number

19355575

19260831

19355573

Engine Type

LSX-Series Gen-IV Small-Block V-8  

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

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

Horsepower

473 hp @ 6000 rpm

476 hp @ 5900 rpm

627 hp @ 6300 rpm

Torque

444 lb-ft @ 5000 rpm

444 lb.-ft. @ 5000 rpm

586 lb-ft @ 5100 rpm

Displacement (cu. in.)

376 (6.2L)

376 (6.2L)

454 (7.4L)  

Block

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

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

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

Crankshaft

Forged steel  

Nodular iron  

4340 forged steel with 8-bolt flange  

Camshaft

Hydraulic roller  

Hydraulic roller  

Hydraulic roller

Valve Lift (intake)

2.160 in

.551 in

.648 in

Valve Lift (exhaust)

1.550 in

.522 in

.648 in

Camshaft Duration (@.050)

210° intake/230° exhaust

204° intake/211° exhaust

236° intake/246° exhaust

Cylinder Heads

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

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

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

Compression Ratio

9.0:1

9.0:1  

11.0:1  

LSX376-B15

MORE INFO

LSX376-B8

MORE INFO

Part Number

19355575

19260831

Engine Type

LSX-Series Gen-IV Small-Block V-8  

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

Horsepower

473 hp @ 6000 rpm

476 hp @ 5900 rpm

Torque

444 lb-ft @ 5000 rpm

444 lb.-ft. @ 5000 rpm

Displacement (cu. in.)

376 (6.2L)

376 (6.2L)

Block

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

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

Crankshaft

Forged steel  

Nodular iron  

Camshaft

Hydraulic roller  

Hydraulic roller  

Valve Lift (intake)

2.160 in

.551 in

Valve Lift (exhaust)

1.550 in

.522 in

Camshaft Duration (@.050)

210° intake/230° exhaust

204° intake/211° exhaust

Cylinder Heads

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

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

Compression Ratio

9.0:1

9.0:1  

LSX454

MORE INFO

Part Number

19355573

Engine Type

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

Horsepower

627 hp @ 6300 rpm

Torque

586 lb-ft @ 5100 rpm

Displacement (cu. in.)

454 (7.4L)

Block

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

Crankshaft

4340 forged steel with 8-bolt flange

Camshaft

Hydraulic roller  

Valve Lift (intake)

.648 in

Valve Lift (exhaust)

.648 in

Camshaft Duration (@.050)

236° intake/246° exhaust

Cylinder Heads

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

Compression Ratio

11.0:1

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Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. These parts are designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. Visit www.chevroletperformance.com/emissions for more details.