Chevy LS376-515 HP - LS3 Carbureted

There's just something about a 515 HP LS3 with a carburetor on it that will raise some eyebrows. If you want unique, this is the engine combo for you. GM Performance made the LS376-515 an amazing performer. When you read what's inside, you'll believe in this LS crate engine! High flow cylinder heads and a cam with massive bumps make this a fire breathing dragon.

The LS376-515 HP crate engine uses the "ASA Hot Cam" (p/n 12480110). This is a hydraulic roller camshaft with .525-inch intake and exhaust valve lift numbers with duration @ .05-inch of 226° intake and 236° exhaust. This cam is a major reason the crate motor produces the performance numbers it does.

Because it's carbureted, this engine is easier to install than a similar fuel injected LS3.

*Applications have not been validated. They are merely suggestions of how you might enjoy your GM Performance Parts crate engine. Some applications may affect engine warranty. See specific warranty information. Some applications may not be emission legal; check state and local ordinances.

LS376-480 HP - LS3 Gen IV TECH SPECS:
Part Number: 19171225
Block (P/N 12584727): Cast Aluminum with 6-bolt, cross-bolted main caps
Bore x Stroke (in): 4.06 x 3.62 (103.25 x 92mm)
Camshaft duration (@.050 in): 226 degree intake / 236 degree exhaust
Camshaft type (P/N 12480110): Hydraulic roller
Compression ratio: 10.7:1
Connecting rods (P/N 12617570): Powdered metal
Crankshaft (P/N 12597569): Powdered metal
Cylinder heads (P/N 12598594): LS3 rectangle port; as cast with 68cc chambers
Displacement (cu in):376 cu in (6.2L)
Engine type: LS Series Gen IV small-block V8
Maximum recommended RPM: 6600
Part number: 19171224
Pistons (P/N 19165089): Hypereutectic aluminum
Recommended fuel: 92 octane
Reluctor wheel:58x
Rocker arm ratio: 1.7:1
Rocker arms (P/N 10214664 exh): Investment cast, roller trunnion
Rocker arms (P/N 12569167 int): Investment cast, roller trunnion
Valve lift (in): .525" intake / .525" exhaust
Valve size (in): 2.16 int / 1.59 exhaust
Balanced: Internal

LS376 515 HP engine

Part #: 19171225

LS376 515 HP dyno image