Specifications: Vehicle fitment ： 2013, 2014, 2015, 2016, 2017 & 2018 Dodge Ram 2500/3500 6.7 Cummins Diesel. Crew cab short bed, crew cab long bed & mega cab. This will not fit the Cab & Chassis commercial style truck. Will not fit trucks with air-ride suspension. Muffler and Cat DELETE Pipe Kits: Made from T-409 stainless steel. Unlike T-304 Stainless its still magnetic. So if your testing to see if you actually got stainless; beware that a magnet will still stick to it. Thickness: 2mm Inlet Diameter: 4" Get rids of restricting cat pipe (catless, decat, test pipe) Package Includes: 2x Pipes