compare lsx engines

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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LSX454R

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Part Number

19355575

19260831

19355573

19260835

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

LS-Series Small-Block V-8

Horsepower

473 hp @ 6000 rpm

476 hp @ 5900 rpm

627 hp @ 6300 rpm

776 hp @ 7000 rpm

Torque

444 lb-ft @ 5000 rpm

444 lb.-ft. @ 5000 rpm

586 lb-ft @ 5100 rpm

649 lb-ft @ 5100 rpm

Displacement (cu. in.)

376 (6.2L)

376 (6.2L)

454 (7.4L)  

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  

LSX cast iron with 6-bolt cylinder head attachment  

Crankshaft

Forged steel  

Nodular iron  

4340 forged steel with 8-bolt flange  

4340 forged steel

Camshaft

Hydraulic roller  

Hydraulic roller  

Hydraulic roller

Mechanical roller  

Valve Lift (intake)

2.160 in

.551 in

.648 in

2.250 x 6.370 in

Valve Lift (exhaust)

1.550 in

.522 in

.648 in

1.625 x 6.400 in

Camshaft Duration (@.050)

210° intake/230° exhaust

204° intake/211° exhaust

236° intake/246° exhaust

250° intake/270° 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

Drag race cylinder heads 6-bolt LSX aluminum  

Compression Ratio

9.0:1

9.0:1  

11.0:1  

13.1:1  

LSX376-B15

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LSX376-B8

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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

LSX454R

MORE INFO

Part Number

19355573

19260835

Engine Type

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

LS-Series Small-Block V-8

Horsepower

627 hp @ 6300 rpm

776 hp @ 7000 rpm

Torque

586 lb-ft @ 5100 rpm

649 lb-ft @ 5100 rpm

Displacement (cu. in.)

454 (7.4L)

454 (7.4L)

Block

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

LSX cast iron with 6-bolt cylinder head attachment

Crankshaft

4340 forged steel with 8-bolt flange

4340 forged steel

Camshaft

Hydraulic roller  

Mechanical roller

Valve Lift (intake)

.648 in

2.250 x 6.370 in

Valve Lift (exhaust)

.648 in

1.625 x 6.400 in

Camshaft Duration (@.050)

236° intake/246° exhaust

250° intake/270° exhaust

Cylinder Heads

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

Drag race cylinder heads 6-bolt LSX aluminum

Compression Ratio

11.0:1

13.1:1


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Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet Federal Motor Vehicle Safety Standards and emissions regulations and should not be operated on public roads. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.

  • With 5.3L EcoTec3 V8 engine. Based on GM Large SUV segment and EPA-estimated MPG highway: 23 (2WD), 22 (4WD).

  • EPA-estimated MPG city/highway: Sonic with 1.8L engine and 5-speed manual transmission 26/35; with 1.8L engine and 6-speed automatic transmission 25/34; with 1.4L engine and 6-speed manual transmission 28/37; with 1.4L engine and 6-speed automatic transmission 27/35.

  • Dependability based on longevity: 1987 – July 2017 full-size pickup registrations.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.

  • MyLink functionality varies by model. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices.

  • Do not use summer-only tires in winter conditions, as it would adversely affect vehicle safety, performance and durability. Use only GM-approved tire and wheel combinations. Unapproved combinations may change the vehicle’s performance characteristics. For important tire and wheel information, go to my.chevrolet.com/learn/tires or see your dealer.

  • With rear seats folded. Cargo and load capacity limited by weight and distribution

  • EPA-estimated 29 MPG city/39 highway with 5-speed manual transmission and 30 MPG city/38 highway with available Continuously Variable Transmission

  • EPA-estimated 29 MPG city/38 highway with 5-speed manual transmission and 30 MPG city/38 highway with available Continuously Variable Transmission.

  • EPA estimated with 3.6L V6 engine.

  • Cargo and load capacity limited by weight and distribution.

  • EPA estimated with 3.6L V6 engine

  • Chevrolet Infotainment System functionality varies by model. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices.

  • Vehicle user interface is a product of Apple and its terms and privacy statements apply. Requires compatible iPhone and data plan rates apply. Apple CarPlay, Siri, iPhone and iTunes are trademarks for Apple Inc, registered in the U.S. and other countries.

  • Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner’s Manual for more information.

  • Requires available Performance Exhaust or Z51 Performance Package.

  • Requires available Performance Exhaust or Z51 Performance Package.

  • If you decide to continue service after your trial, your selected subscription plan will automatically renew thereafter. You will be charged at then-current rates. Fees and taxes apply. To cancel you must call SiriusXM at 1-866-635-2349. See SiriusXM Customer Agreement for complete terms at siriusxm.com. All fees and programming subject to change. ©2018 Sirius XM Radio Inc. All rights reserved.

  • Before you buy a vehicle or use it for trailering, carefully review the Trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • EPA-estimated 28 City/39 Hwy MPG

  • With second row seats folded flat. Cargo and load capacity limited by weight and distribution.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.

  • Read the vehicles Owner’s Manual for more important feature limitations and information.

  • Does not detect people or items. Always check rear seat before exiting.

  • Vehicle user interface is a product of Google and its terms and privacy statements apply. Requires the Android Auto app on Google Play and an Android compatible smartphone running Android 5.0 Lollipop or higher. Data plan rates apply. Android, Android Auto, Google, Google Play and other marks are trademarks of Google LLC.

  • Service varies with conditions and location. Requires active OnStar service and paid AT&T data plan. Visit onstar.com for details and limitations.

  • Premier shown seats seven. Standard on L, LS. Available on LT.

  • EPA-estimated 18 MPG city/ 27 MPG highway 3.6FWD.

  • With second and third row seats folded flat. Cargo and load capacity limited by weight and distribution.

  • EPA-estimated 18 MPG city/ 27 MPG highway 3.6FWD.

  • Read the vehicle owner's manual for important feature limitations and information.

  • The system wirelessly charges one PMA- or Qi-compatible mobile device. Some devices require an adaptor or back cover. To check for phone or other device compatibility, visit my.chevrolet.com/learn for details.

  • EPA-estimated 25 MPG city/31 highway (FWD models).

  • With rear seats folded. Cargo and load capacity limited by weight and distribution.

  • With second and third row seats folded flat. Cargo and load capacity limited by weight and distribution.

  • With 5.3L EcoTec 3 engine. EPA-estimated MPG city/highway: Suburban 2WD 15/22, 4WD14/21.

  • Based on GM Large SUV segment. With 5.3L EcoTec 3 engine. EPA-estimated MPG city/highway: Tahoe 2WD 15/22, 4WD 15/21.

  • With second and third row seats folded flat. Cargo and load capacity limited by weight and distribution.

  • Read the vehicles Owner's Manual for more important feature limitations and information.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.