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hp @ 6500 rpm

Affordable LS3-based high performance for the street or track

Using the LS3 engine as its foundation, the LS376/515 crate engine adds Chevrolet Performance’s racing-derived ASA Cam and a carbureted intake system to produce 515 horsepower at a stellar 6500 rpm and 469 lb-ft of torque at 5000 rpm. It’s the perfect high-performance option for a classic project car or racecar.

The assembly includes a Corvette oil pan and LS3 cylinder heads, with high-flow, rectangular-port intake passages, as well as our unique, spider-type carburetor intake manifold. At the heart of the engine is the ASA cam, which extends the performance range of the LS3 with more duration. That means it holds the valves open longer, enabling greater airflow at higher rpm. Wind it out yourself and you’ll see what we mean!

You’ll need our LSX controller (P/N 19171130) and Holley 770-cfm carburetor (P/N 19170093) to finish off and fire up this bad boy.

LS376/515 DYNO

Click on the slider to see the torque and power ratings change with rpm.*

*Approximate values shown.


Part Number:
Engine Type:
LS-Series Gen IV Small-Block V-8
Displacement (cu. in.):
376 (6.2L)
Bore x Stroke (in.):
4.065 x 3.622 (103.25 x 92 mm)
Block (P/N 12623967):
Cast-aluminum with six-bolt, cross-bolted main caps
Crankshaft (P/N 12597569):
Nodular iron
Connecting Rods (P/N 12607475):
Powdered metal
Pistons (P/N 19207287):
Hypereutectic aluminum
Camshaft Type (P/N 88958770):
Hydraulic roller
Valve Lift (in.):
.525 intake / .525 exhaust
Camshaft Duration (@.050 in.):
226° intake / 236° exhaust


Cylinder Heads (P/N 12629063):
Aluminum L92-style port; “as cast” with 68-cc chambers
Valve Size (in.):
2.165 intake / 1.590 exhaust
Compression Ratio:
Rocker Arms (P/N 12569167 int):
Investment-cast, roller trunnion
Rocker Arms (P/N 10214664 exh):
Investment-cast, roller trunnion
Rocker Arm Ratio:
Recommended Fuel:
92 octane
Maximum Recommended rpm:
Reluctor Wheel:


Already own one, but lost some of the paperwork? We’ve got you covered with downloads and links for some of the more important documents below. You’ll find everything from the vital data about your engine’s capabilities to how to install it into your build, even all of the warranty information should you need to make a claim. And don’t forget, the best way we can make sure to get you the latest information on your specific part is to tell us which one you have by registering your engine. No matter what stage of your build you’re in — from shopping for the right part to that part having turned in a few miles — we have the information you need.

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    • Assembly does not include any electronics
    • Use LSX ignition controller (P/N 19171130) (includes harness)
    • Includes Corvette wet sump oil pan
    • Intended for pre-1976 street vehicles or any off-road vehicle
    • Not intended for marine applications
    • 770-cfm carb (P/N 19170093) recommended for daily street use
    • Non-Corvette applications require flexplate (P/N 12637677)
    • Front-end accessory drive kits are available in two configurations
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Download a catalog for a full listing of components and related parts.

SuperMatic 4L70-E Four-Speed Automatic
Transmission • P/N 19299055

Transmission Controller • P/N 19212657

SuperMatic Torque Converter • P/N 19299803

LS-Series Starter • P/N 10465385

Corvette Accessory Drive Kit • P/N 19155067

Carburetor, Holley 770-cfm • P/N 19170093

  • 1 Performance MSRP The Manufacturer's Suggested Retail Price excludes tax, shipping and installation.

Destination Freight Charges

To allow you to do an accurate price comparison with prices featured on other Internet sites, GM provides Internet pricing both with and without the Destination Freight Charge (see prices including Destination Freight Charge below). To get full pricing details, go to our Build Your Own section.