By The Numbers

LSX 454
Part Number: 19170112
Engine Type: LSX Series Gen IV
  small-block V-8
Displacement: 454 cubic inches (7.4 liters)
Bore: 4.185 inches (106.3 mm)
Stroke: 4.125 inches (104.8 mm)
Block: LSX cast-iron
  with 6-bolt cross-bolted
  main caps (PN 19243172)
Crankshaft: 4340 forged steel
  (PN 19170391)
Connecting Rods: 4340 forged steel
  (PN 19166964)
Pistons: forged aluminum
  (PN 19166958)
Camshaft type: hydraulic roller
  (PN 19166972)
Valve Lift: .635-inch intake/.635-inch exhaust
Camshaft duration: 236 intake/246
  exhaust at .050-inch lift
Cylinder heads: aluminum LSX-LS7 port
  (PN 19201806)
Chamber size: 70 cc as-cast
Intake valve diameter: 2.20 inches
Exhaust valve diameter: 1.61 inches
Compression ratio: 11:1
Rocker arm ratio: 1.8:1
Intake manifold: LSX-LS7 standard deck
  (PN 19166948)
Recommended fuel: 92 octane
Max recommended RPM: 6,500
Reluctor Wheel: 58X
Balanced: internal

GM Performance Parts