Looking to add a little growl to your 6.7 Powerstroke? The AFE 49-43102 Rebel XD 4 Inch Filter-Back Exhaust is just the ticket. This system is designed to give you increased performance and an aggressive sound, thanks to the 4" mandrel-bent stainless steel tubing and two sleek black or polished stainless steel exhaust tips. Plus, it's easy to install, so you can enjoy your upgraded ride in no time.