If you're looking to give your L5P Duramax a little more power and a whole lot more style, then you need the AFE 49-44086-P Large Bore HD Dual 4 Inch Filter-Back Exhaust. This system is crafted from 4" mandrel-bent stainless steel for durability and performance, and it comes with your choice of black or polished exhaust tips. It's the perfect way to enhance your truck's appearance and get a little more power under the hood.