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 6,500 rpm and 469 lb.-ft. of torque at 5,000 rpm. It’s the perfect high-performance option for a classic project car or race car.

The assembly includes a Chevy SS 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 TECH SPECS
Part Number: 19301359
Engine Type: LS-Series Gen IV Small Block V8
Displacement (cu in): 376 cu in (6.2L)
Bore x Stroke (in): 4.065 x 3.622 (103.25 x 92mm)
Block (P/N 12623967): Cast Aluminum with 6-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 68cc Chambers
Valve Size (in): 2.165 int / 1.590 Exhaust
Compression Ratio: 10.7:1
Rocker Arms (P/N 12569167 int): Investment Cast, Roller Trunnion
Rocker Arms (P/N 10214664 exh): Investment Cast, Roller Trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: 92 Octane
Maximum Recommended rpm: 6,600
Reluctor Wheel: 58X
Balanced: Internal

INSTALLATION NOTES

• Assembly does not include any electronics
• Use LSX ignition controller P/N 19171130 (includes harness) (page 205)
• Includes Chevy SS 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
• Front-end accessory drive kits are available in two configurations (see page 247 for application).

LS376/515 Engine Specifications PDF