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It is a fully formulated 7-in-1 diesel treatment to prevent diesel fuel from gelling and icing
1990-1998 Cummins 5
2017-2019 Duramax L5P 4" Downpipe Back Exhaust w/ Muffler (431021)
so they fit just like the originals
75MM Undersize (MS-2328P-
2008-2010 Powerstroke 6.4L 5" Downpipe Back Exhaust No Muffler (521002) Material:Aluminized It is a fully formulated2008 2010 Powerstroke 6. 4L 5" Downpipe Back Exhaust No Muffler (521002) Constructed 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 Flo~Pro system. For powerhouse performance, Flo~Pro delivers horsepower you can hear!