Dieselr Aluminized 4" Cat & DPF/SCR Race Pipe | Ram 2500/3500 6.7L Cummins 2019-2024The Dieselr Aluminized 4" Cat & DPF SCR Race Pipe (20192024 6. 7L Cummins) is engineered for Ram 2500 and 3500 owners who demand real strength, clean fitment, and dependable performance. Crafted from heavy duty aluminized steel, this system improves exhaust flow, lowers EGTs, and withstands years of towing, hauling, and tuned operation. Every Dieselr race pipe is precision bent with mandrel tubing and welded flanges for smooth transitions and leak