GM Performance 19244549 - GM Performance Parts 376CID/480HP LS3 Engine Details

Block (P/N 809-12584727): 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): 219 degree intake / 228 degree exhaust
Camshaft type (P/N 809-88958733): Hydraulic roller
Compression ratio: 10.7:1
Connecting rods (P/N 809-12617570): Powdered metal
Crankshaft (P/N 809-12597569): Powdered metal
Cylinder heads (P/N 809-12598594): 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: 809-19171224
Pistons (P/N 809-19165089): Hypereutectic aluminum
Recommended fuel: 92 octane
Reluctor wheel: 58x
Rocker arm ratio: 1.7:1
Rocker arms (P/N 809-12569167 int): Investment cast, roller trunnion
Valve lift (in): .525" intake / .525" exhaust
Balanced: Internal
Valve size (in): 2.16 int / 1.59 exhaust