2020-2026 L5P Smeding Diesel Max Flow KitTUNING NOT REQUIRED ! Designed for the 20202026 L5P Duramax, this performance package improves both intake and exhaust flow by combining a high efficiency airflow system with a 3. 5 inch downpipe upgrade. It helps your turbo and engine breathe better, delivering sharper throttle response, quicker turbo spool, and overall better performance. This setup also replaces factory components known to restrict flow or fail under pressure, reducing the risk of
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