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LS6 5.7L without ECM and Wire Harness - Corvette Z06 Performance straight out of the crate!

Nothing says performance like engine code LS6! Producing more than 400 horsepower, the LS6 transformed the Corvette Z06 into a world-beating sports car. GM Performance Parts now offers this ultimate small-block performer in a complete crate engine package—just the extra muscle your Corvette or F-car road racer needs to sweep off the competition.

The 5.7-liter LS6 builds on the inherent strengths of the Corvette’s LS1 engine, but benefits from a higher-lift camshaft and higher-compression pistons to raise horsepower from 350 to 405, and torque from 340 lb.-ft. to 400 lb.-ft. Such tremendous power is produced through the use of hollow-stem valves, a more aggressive camshaft, improved intake and higher-rate valve springs.

GM Performance Parts delivers the LS6 as an all-inclusive assembly, complete with Corvette-style aluminum oil pan, large-volume composite water intake manifold with single-bore throttle body, and high-performance log-style exhaust manifolds.

The LS6 is also a great choice for older cars and street rods whose owners are looking for high-tech performance and fuel-injected dependability!

Possible Applications

  • The perfect replacement engine for your late model Camaro or Firebird
  • Add a small-block LS6 to your vintage Chevelle
  • Add a Corvette motor to your project car

*Applications have not been validated. They are merely suggestions of how you might enjoy your GM Performance Parts crate engine. Some applications may affect engine warranty. See specific warranty information. Some applications may not be emission legal; check state and local ordinances.

LS6 5.7L TECH SPECS:
Part Number: 17801268
Engine type: LS Series small-block V-8
Displacement (cu in): 346 (5.7L)
Bore x stroke (in): 3.90 x 3.62 (99 x 92 mm)
Block (P/N 12561166): Cast aluminum with 6-bolt, crossbolted main caps
Crankshaft (P/N 12583565): Nodular iron
Connecting rods (P/N 12577583): Powered metal steel
Pistons (P/N 88984245): Hypereutectic aluminum
Camshaft type (P/N 12565308): Hydraulic roller
Camshaft lift (in): .525 intake / .525 exhaust
Camshaft duration (@.050 in): 204'c1 intake / 211'c1 exhaust
Cylinder heads (P/N 12564825): Aluminum, symmetrical port
Valve size (in): 2.00 intake / 1.55 exhaust
Compression ratio: 10.5:1
Rocker Arms: Investment cast, roller trunnion
Rocker arm ratio (P/N 10214664): 1.7:1
Recommended fuel: 92 octane
Maximum rpm: 6500
Reluctor wheel: 24X

Chevy Performance LS6 5.7 liter corvette Zo6 engine image

Part #: 17801268

LS6 - 2004 Corvette Engine

ls6 5.7 liter corvette dyno image

Installation Notes

  • Assembly includes 14" flywheel.
  • Assembly does not include any electronics.