LSX Engine

Description

The GM LSX Engine represents the pinnacle of the LS family — a purpose-built performance block engineered for high horsepower and torque applications. Originally introduced by Chevrolet Performance, the LSX combines the proven LS architecture with a reinforced cast-iron design, thicker cylinder walls, and six-bolt main caps. This foundation supports massive power upgrades including superchargers, turbochargers, and nitrous systems.

Available in multiple variants such as the LSX376-B15, LSX454, and LSX427, this engine platform is ideal for drag racing, street builds, and pro-touring projects. The LSX series offers reliability under extreme conditions while maintaining the precision and smoothness GM’s LS engines are known for. Whether naturally aspirated or boosted, the LSX delivers race-proven durability and street-ready power — making it one of the most versatile performance engines in the market.

LSX376 Engine (6.2L)

The LSX376 variant is a 6.2L powerhouse built to handle forced induction applications. Rated for up to 1,000 horsepower, it’s crafted with forged pistons, a nodular iron crankshaft, and high-flow aluminum heads. Ideal for turbo or supercharged builds, the LSX376 delivers robust torque and quick throttle response, making it a popular choice for performance enthusiasts and racers. This version suits Camaro SS, Corvette, and Silverado LS swaps, providing bulletproof strength with OEM compatibility.

LSX427 Engine (7.0L)

The LSX427 brings legendary big-block power to the LS platform, boasting a massive 7.0L displacement and up to 570 horsepower in factory form. It features a longer stroke, high-compression pistons, and a performance camshaft for explosive acceleration. Designed for track and drag racing, the LSX427 delivers incredible torque and high-RPM stability. Its aggressive power delivery and unmistakable V8 sound make it a top pick for custom builds and restomods.

LSX454 Engine (7.4L)

The LSX454 is the crown jewel of GM’s performance lineup, offering 620 horsepower and 600 lb-ft of torque straight out of the box. This 7.4L beast pairs big-block strength with small-block technology for extreme output and durability. It’s built for enthusiasts who demand the ultimate street-and-strip performance. With forged internals, CNC-ported heads, and a high-lift cam profile, the LSX454 delivers unrelenting power while maintaining exceptional reliability — a hallmark of Chevrolet Performance engineering.

LSX Engine for Custom Builds and Swaps

The LSX Engine has become the gold standard for custom swaps and high-performance conversions. From Pro Street builds to drift cars, its adaptability and aftermarket support make it a favorite among professionals. It mates easily with most GM transmissions and ECU systems, ensuring seamless installation. With the potential for 1,000+ horsepower and incredible tuning flexibility, the LSX Engine gives builders a solid, race-ready foundation that outperforms nearly any other small-block V8 on the market.

Frequently asked question