LS 376/480 Tech Specs

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):

219 degree intake / 228 degree exhaust

Camshaft type (P/N 88958733):

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 12569167 int):

Investment cast, roller trunnion

Valve lift (in):

.525" intake / .525" exhaust

Balanced:

Internal

Valve size (in):

2.16 int / 1.59 exhaust