Looking for an upgrade to your 6.7 Powerstroke's exhaust system? Check out the AFE 49-43122 Large Bore HD 4 Inch Dual Filter-Back Exhaust System. This 100% MIG-welded system utilizes factory-style flanges and hangers for an easy installation, and is made from mandrel-bent 409 stainless steel tubing for durability and optimal flow. Plus, it comes with dual 6" diameter black or polished 304 stainless steel clamp-on exhaust tips for a finished look. All necessary hardware is included.