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The used LQ4 engine for sale is a proven 6.0L V8 that blends performance and endurance. Designed for heavy-duty applications, it features a robust cast-iron block and aluminum heads, giving it remarkable strength. Delivering over 300 horsepower, it’s perfect for high-torque demands like towing or hauling. This GM Vortec motor also serves as a top choice for LS-swap projects thanks to its compatibility with performance upgrades. When you buy a used LQ4, you’re choosing reliability, affordability, and impressive longevity—all backed by GM’s engineering excellence.