SPECIFICATIONS

Part number:

19171049

Engine type:

LSX Series Gen IV small-block V-8

Displacement (cu in / L):

376 / 6.2L

Bore x stroke (in):

4.06 x 3.62 

Block (P/N 19166454):

LSX cast iron with six-bolt, cross-bolted main caps

Crankshaft:

nodular iron

Connecting rods:

powdered metal

Pistons:

forged aluminum

Camshaft type:

hydraulic roller

Valve lift (in):

0.551 intake / 0.522 exhaust

Duration (deg at 0.050 in):

204 intake / 211 exhaust

Cylinder heads (P/N 12598594):

LS3 rectangular port; as cast with 68cc chambers

Valve size (in):

2.16 intake / 1.59 exhaust

Compression ratio:

10.7:1

Rocker arms:

investment cast, roller trunnion

Rocker arm ratio:

1.7:1

Recommended fuel:

92 octane

Reluctor wheel:

58X

Balanced:

internal

LSX454

Part number:

19166972

Engine type:

LSX Series Gen IV small-block V-8

Displacement (cu in / L):

454 / 7.4

Bore x stroke (in):

4.185 x 4.125 

Block (P/N 19166454):

LSX cast iron with 6-bolt, cross-bolted main caps

Crankshaft:

4340 forged steel

Connecting rods:

4340 forged steel

Pistons:

Forged aluminum

Camshaft type:

Hydraulic roller

Valve lift (in):

0.635 intake / 0.635 exhaust

Duration (deg at 0.050 in):

236 intake / 240 exhaust

Cylinder heads (P/N 12598594):

LSX454 rectangular port; with 70cc chambers; valve size (in): 2.20 intake / 1.61 exhaust

Compression ratio:

11:1

Rocker arms:

investment cast, roller trunnion

Rocker Arm Ratio:

1.8:1

Recommended Fuel:

92 octane

Reluctor wheel:

58X

Balanced:

internal