Built for Street and Strip

A Best-of-Both-Worlds High and Low End Upgrade

Chevy's Toughest 'Indestructible' Bottom End Engine

Iron Block with High-Performance Rectangular Port Heads

Largest Inventory of LQ9 LS364/450 Engines in the USA

WE HAVE LQ9's IN STOCK - ORDER NOW!

In Stock and Ready to Ship!

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Big Horsepower

Up to 452 HP

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Big Torque

Up to 441 lb.-ft.

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Perfect Displacement

Up to 364 cu. in. (6.0L)

New LS364/450 Crate Engine

High-Lift Power

Equipped with a performance-focused LS6 hydraulic roller camshaft for an aggressive idle and 6,000+ RPM capability without sacrificing reliability.

Massive Airflow

Rectangular-port LS3 cylinder heads (as seen on the C6 Corvette) allow this engine to breathe far better, unlocking massive top-end potential.

KARL LS3 Cylinder Head - Gemini
Engine specs

Performance Ready

Karl Kustoms LQ9 Crate Engines feature the legendary 6.0L iron block durability of the LQ9, topped with high-flow LS3 aluminum heads for a potent 452 HP street machine.

Long-Life Durability

Built on a rugged cast-iron block with 6-bolt cross-bolted main caps and a nodular iron crankshaft, ensuring unbreakable bottom-end strength for extended street use.

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KARL Swap Ready - Gemini

Swap-Ready Base

The LQ9 LS364/450 package arrives as a long block with a truck-style oil pan and timing cover, allowing you to choose the perfect intake and accessory drive for your build.