Chevrolet Performance LS3 495 HP Long Block Crate Engines 19432424

This Chevrolet Performance LS3 (part 19432424) uses an aggressive high-lift camshaft to push a stock 430-horsepower LS3 up to 495 horsepower, with torque climbing to 473 lb-ft. The same 6.2L, 376 cubic inch aluminum block and heads carry over from the factory engine unchanged.

Built for builders who want to finish it their way

This long block skips several systems entirely: no intake manifold or throttle body, no water pump or fuel injectors, and no computer or wiring harness, so it suits builders who already have aftermarket fuel injection or a carburetor setup in mind rather than buyers looking for a plug-and-play package. Oil pan, timing cover, and valve covers ship installed, along with the harmonic balancer.

What changed from a stock LS3

The camshaft profile is the key difference: Chevrolet Performance increased lift and duration over the factory cam, which takes rated output from 430 to 495 horsepower while leaving the stock 10.7:1 compression ratio and aluminum block and heads unchanged. Premium fuel at 91 octane or higher is recommended given that compression.

Common questions

Does it include a flywheel or intake manifold? No, neither is included; source them to match your specific vehicle and fuel system. Is this suited to a classic Camaro or Corvette swap? Yes, provided the ECU and fuel system you pair with it are built for this level of output. Does the balance or block change from a stock LS3? No, the block, heads, and 10.7:1 compression stay the same; only the camshaft is different.

Specifications