5" aluminized constant-diameter DPF-back system. Far less backpressure than stock. Improves flow and cuts backpressure, allowing the engine to produce more horsepower. Includes Huge Polished Chrome or Cerakote Black Patented SideKick tip. Banks Power introduces the new 5" Monster Exhaust designed specifically for the 2010-2012 Ram 2500/3500 6.7L pickup trucks. The DPF-back exhaust system features constant-diameter 5" mandrel-bent aluminized steel tubing and a massive patented tip which virtually eliminates backpressure after the DPF.With the stock exhaust measuring a mere 4" compared to the Monster Exhaust's massive 5" outlet, the Banks system offers a 60% greater flow area than stock, and the Monster Exhaust boasts less backpressure than stock, leading to more power and increased fuel economy.Cummins owners can choose from two huge patented 6.5" x 7.5" ob-round slash-cut exhaust tips, chrome-plated polished stainless steel or high-temp matte black with a rolled edge. And, unlike other brands, Banks' chrome-plated stainless tip will not turn brown with heat. US Patent #5,581,111 S1