15-16 Chevrolet/GMC 2500/3500 EC/CC 6.6L Duramax, Armor Lite 4-Inch Filter-Back Single Side Exit, with Carb Approved Downpipe, MBRPDoes your 2015 2016 Chevrolet GMC 2500 3500 6. 6L Duramax require a replacement exhaust? We've got you sorted, install MBRP's S6009PLM! The S6009PLM is a 4 inch filter back single side exit along with a carb approved downpipe. Constructed from heavy gauged aluminized steel, this material is cost effective and ideal for mild environments. By using smooth mandrel bent tubing and omitting a muffler, the S6009PLM provides a more direct flow path,