4" Downpipe Back Single With Muffler | 2011-2015 GM 2500/3500 6.6L DURAMAX-431016 Idle Kits and Parts " 6L Duramax: DEF pump

4" Downpipe Back Single With Muffler | 2011-2015 GM 2500/3500 6.6L DURAMAX-431016 Idle Kits and Parts " 6L Duramax: DEF pumpConstructed out of 16 gauge aluminized steel or T409 Stainless, this exhaust system is designed to simplify installation with included clamps, preweld contour bends and improved flanges. Enjoy a noticeable boost in performance, lowered EGTs and amplified air flow with this Mel's system. For powerhouse performance, Mel's delivers horsepower you can hear! Features: Ease of installation Contour Bent Hangers TorcTite Clamps No Bungs Fits Cab Box

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