On the Duramax platform, a smart approach is to focus on systems that reduce restrictions and improve efficiency rather than just chasing horsepower. A good starting point is an l5p delete kit , which allows the engine to breathe more freely while improving reliability. Pair it with a solid tune, reinforced intercooler pipes, and upgraded filtration to handle higher demands. Just make sure all supporting systems are aligned – fuel delivery, cooling, and exhaust flow – to keep things running smoothly and avoid stress on internals.