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GM PERFORMANCE Crate Motor - LS7 505HP


Product Description

GM PERFORMANCE Crate Motor - LS7 505HP


In annals of high-performance engines, the Corvette Z06's LS7 will be remembered as a benchmark in naturally aspirated power. It will also go down as one of the most popular LS crate engines ever offered, with 505 horsepower and 470 lb-ft of torque.

Within its classic 427-cu-in displacement, engineers extracted Big-Block grunt from its high-revving Small-Block package. It features a unique, big-bore cylinder block that is anchored with a forged crankshaft, featherweight titanium connecting rods, and friction-coated pistons. But it's the airflow capability of the cavernous, CNC-ported heads that enables its tremendous power. Large-volume, straight-passage intake runners channel air directly through 2.20-inch titanium intake valves.

Chevrolet Performance's LS7 7.0L crate engine package includes a production-style engine with the dry sump oil pan. You'll need to supply the external oil supply and oil lines to the engine, but the rest of the assembly is fully dressed, including the manifold assembly with injectors and electronically controlled throttle body, and log-style exhaust manifolds. Use our LS7 controller kit (P/N 19258553) to get it running in your project vehicle.



  • Part Number: 19244098.
  • 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 12641692): Forged steel.
  • Connecting Rods (P/N 12586258): Forged titanium.
  • Pistons: Hypereutectic aluminum.
  • Camshaft Type (P/N 12638426): Hydraulic roller.
  • Camshaft Lift (in.): .591 intake / .591 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: 91 octane Maximum.
  • Recommended rpm: 7000.
  • Reluctor Wheel: 58X.
  • Balanced: Internal.

Installation Notes:

  • Assembly does not include any electronics.
  • LS7 Controller Kit (P/N 19258553) available for non-Corvette applications. Kit includes electronic throttle pedal, which is required for throttle input to the ECU.
  • Comes assembled with 14-inch Corvette Z06 168-tooth flywheel.
  • LS7 is the same size and mounts the same as other LS-Series engines.
  • Use oil hose adapters (P/N 25534412) to adapt to AN-12 fittings.
  • Intended for pre-1976 street vehicles or any off-road vehicle.
  • Not intended for marine applications.

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