2016 Chev/GMC - 2500/35004" Filter Back, Cool Duals® , T409
2011-2019 Chev/GMC - 2500/35004" Filter Back, Dual Outlet Single Side, AL
2011-2019 Chev/GMC - 2500/35004" Filter Back, Dual Outlet Single Side, T304
2007-2010 Chev/GMC - 2500/3500 Duramax, All LMM4" Filter Back, Cool Duals®, AL
2001 - UP CHEV/GMC 2500/3500 6.6L DURAMAX, DOWN PIPE BACK, EC/CC, OFF-ROAD 4" Down Pipe Back, Cool Duals®, AL TIP, 4" IN, 5" OD SINGLE WALL TIP ROLLED LIP "Not for use on vehicles equipped with Catalytic Converter" ( 2002-2004 'Clean State' [California] has a Catalytic Converter)