The LS3 gets a big cam and carbureted intake manifold for an additional 85 horsepower!
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 LS376/515, an upgraded LS3 that is equipped with an aggressive camshaft and GM Performance Parts' exclusive carburated intake manifold. Two simple upgrades that add up to 515 horsepower - an 85 horsepower bump over the stock LS3.
The LS3 comes fully equipped with components that only a few yaers ago would have been the exclusive property of race engines. The block is a rock-solid 6-bolt foundation that holds together the 4.06" bore by 3.62" stroke rotating assembly. The LS3 heads are high-flowing rectangular port aluminum castings. What separates the LS376/515 from the base LS3 is the addition of a GM Performance Parts high performance camshaft and a carbureted intake manifold,
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" intake and exhaust valve lift numbers and duration @ .050" of 226° intake and 236° exhaust.
The GM Performance Part engineers coupled that aggressive camshaft and high flowing cylinder head design with our new carburated intake manifold specific to the L92/LS3 cylinder heads (P/N 25534401). The manifold offers a dramatic increase in horsepower and a simplified installation.
LS376/515 Tech Specs:
Part Number: 19171225
Engine Type: LS Series Gen IV small-block V8
Displacement (cu in): 376 (6.2L)
Bore x stroke (in): 4.06 x 3.62 (103.25 x 92mm)
Block (P/N 12584727): Cast aluminum with 6-bolt, cross-bolted main caps
Crankshaft (P/N 12597569): Nodular iron
Connecting rods (P/N 12617570): Powdered metal
Pistons (P/N 19165089): Hypereutectic aluminum
Camshaft type (P/N 12480110): Hydraulic roller
Camshaft lift (in): .525 intake/.525 exhaust
Camshaft duration (@ .050 in): 226° intake/236° exhaust
Cylinder heads (P/N 12598594): LS3 recatangle port; as cast with 68cc chambers
Valve size (in): 2.16 intake/1.59 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
Rock arm ratio: 1.7:1
Recommended fuel: 92 octane
Reluctor wheel (not used): 58X
Balanced: Internal
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