K4156A-TD – FOR 2011, 2012, 2013, 2014 & 2015 – CHEVY/GMC 6.6L DURAMAX DIESEL 2500/3500 (ALL CAB AND BED LENGTHS) 4″ ALUMINIZED – PERFORMANCE DIESEL EXHAUST KIT – DIESEL PARTICULATE FILTER BACK TURN DOWN SINGLE – STAINLESS STEEL TIP INCLUDED.