Cummins Engine Swap Kits

CMW Trucks - 1947 - 1972 Chevy Truck Parts


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LS376-515 HP - LS3 Carbureted - Big Cam

You know that the LS3 is the hot new small block V8 in the GM arsenal, but you still want more. We proudly offer you the LS 376/515, an upgraded LS3 that is equipped with an aggressive camshaft and GM Performance Part's exclusive carbureted intake manifold. Two simple upgrades that add up to 515 horsepower – a 115 horsepower bump over the stock LS3.

To match the high flow rate of the LS3 cylinder heads, our GM Performance Parts engineers installed the "ASA Hot Cam" (p/n 12480110). This is a hydraulic roller camshaft that offers up .525-inch intake and exhaust valve lift numbers and duration @ .05-inch of 226° intake and 236° exhaust. It truly is a "hot cam" that offers up an aggressive lope at idle and a buzz saw power band that never stops.

The GM Performance Part engineers coupled that aggressive camshaft and high flowing cylinder head design with our new carbureted water intake manifold specific for the L92/LS3 cylinder heads (p/n 25534401). The manifold offers a dramatic increase in horsepower and a simplified installation.

If you like what you see with the new LS3, you'll love the LS 376/515. It's everything you want in a small block V8 – big power, simple package, and a big-inch foundation. The GM Performance Parts intake allows for an easy installation that you will find familiar while still being very powerful. The LS 376/515 – the next great small block from GM Performance Parts.

*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

Chevy Performance LS376 515 HP engine

Part #: 19171225

LS376 515 HP dyno image