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Chevrolet Performance LS7 427ci 7.0L Engine 505 HP

Chevrolet Performance LS7 427ci 7.0L Engine 505 HP


  • LS7, a living legend
    With its classic 427-cubic-inch displacement, the 505-hp LS7 7.0L made its mark in the C6 Corvette Z06 and advanced its legacy in the fifth-generation Camaro Z/28.
  • A living legend
    The LS7 uses a unique cylinder block casting with pressed-in steel cylinder liners to accommodate the engine’s large, 4.125-inch cylinder bores – with deck-plate boring and honing for optimized bore geometry.
  • Standard GMPP 24-Month/50,000-Mile Crate Engine warranty applies.
  • New York Residents subject to sales tax and will be invoiced separately. Contact us for details/questions.
  • Drop ship item – contact us for current availability and shipping time.
SKU: 19329246


LS7 Tech Specs

  • Part Number: 19329246
  • Engine Type: LS-Series Small-Block V-8
  • Displacement (cu. in.): 427 (7.0L)
  • Bore x Stroke (in.): 4.125 x 4.000 (104.8 x 101.6mm)
  • Block (P/N 12602689): Cast-aluminum with six-bolt steel main bearing caps
  • Crankshaft (P/N 12611649): Forged steel
  • Connecting Rods (P/N 12661677): Forged titanium
  • Pistons: Hypereutectic aluminum
  • Camshaft Type (P/N 12638426): Hydraulic roller
  • Camshaft Lift (in.): .593 intake / .588 exhaust
  • Camshaft Duration (@.050 in.): 211° intake / 230° exhaust
  • Cylinder Heads (P/N 12578449): CNC ported LS7-style ports; 70-cc CNC combustion chambers
  • Valve size (in.): 2.200 titanium intake / 1.610 sodium-filled exhaust
  • Compression Ratio: 11.0:1
  • Rocker Arms: Investment-cast, roller trunnion
  • Rocker Arm Ratio: 1.8:1 (offset, intake only)
  • Recommended Fuel: Premium pump
  • Maximum rpm: 7000
  • Reluctor Wheel: 58X
  • Balanced: Internal

Additional information

Weight899 lbs