Swapping an LS engine has become the go-to move for builders across the spectrum, from budget daily drivers to track-focused monsters. With so many variations in the LS family, narrowing down the best options is no small task. Each engine brings its own mix of affordability, performance, and aftermarket support. Summit Racing recently put together a countdown of the top five best LS engines for swaps, and here’s a breakdown of the highlights.

Number Five: LS7

The LS7 from the C6 Corvette Z06 is a serious factory powerhouse. Displacing 7.0 liters and producing 505 horsepower, it features a dry sump oiling system and factory titanium connecting rods. It’s designed to rev past 7,000 rpm and thrives in road racing environments. While it carries a higher price tag, the LS7 is capable of delivering 600-plus horsepower at the wheels naturally aspirated. As the largest Gen IV LS, it remains one of the most desirable options for high-performance swaps.

Number Four: 5.3L Truck Engines (LM7/LC9)

Affordable and widely available, the 5.3-liter truck engines are the backbone of countless budget builds. The LM7, often found for as little as $600 at wrecking yards, has proven to be reliable and boost-friendly. The aluminum LC9 variant adds strength with Siamese bores, offering better cylinder support under boost. These engines helped spark the LS swap craze and remain perfect for turbocharged projects, lightweight cars, or daily drivers. Simple upgrades like an LS6 camshaft and springs can push output to around 465 horsepower.

Number Three: LS1

As the first aluminum LS, the LS1 from the C5 Corvette and fourth-gen Camaro set the stage for modern swaps. It is lightweight, proven, and extremely well-documented in the community. While prices are climbing, the LS1 remains a solid choice for classic muscle cars, RX-7s, and 240SX builds. Its aftermarket support is massive, making it easy to upgrade with bolt-ons, cylinder heads, or even forced induction.

Number Two: LQ4 and LQ9

For those chasing boost and durability, the 6.0-liter iron-block LQ4 and LQ9 truck engines are top picks. They are heavier than aluminum options, but their strength makes them ideal for turbo builds, drift cars, and off-road applications. The LQ9 comes with higher compression, while both blocks handle big power without issue. Their bore size allows the use of performance heads, further expanding their capability.

Number One: LS3

At the top of the best LS engines list is the 6.2-liter LS3. Making 430 horsepower in stock form, it’s light, compact, and incredibly versatile. Its large bores improve airflow and work well with factory rectangular port heads. With a strong aftermarket, the LS3 easily handles cam swaps, intake upgrades, and stroker kits. Capable of 850 to 1,000 horsepower with proper reinforcement, it is the perfect foundation for muscle cars, pro-touring builds, and high-performance swaps of all kinds.

Whether you are aiming for budget-friendly reliability or track-ready horsepower, there’s an LS engine suited for your goals. These five, as highlighted by Summit Racing, stand out as the most proven platforms to start your project.