aFe's Rebel XD Series, dual tip downpipe-back exhaust system for your 2017 Ford Super Duty with the V8-6.7L (td) Power Stroke diesel performs as good as it looks. The Rebel XD system is constructed with 4" mandrel bent 409 stainless steel tubing for improved exhaust flow, lowering EGT's for more HP and torque. Utilizing factory mounting locations, the bayonet tip hangers ensure the Rebel XD exhaust has an OE-style fit and stays put under any driving conditions. MIG welded for durability the Rebel XD comes with high quality band clamps and hardware to provide a quick, hassle-free installation with no modifications necessary. Dual 5" straight cut, high-temp powder coated black stainless steel tips with intercooling vents reduce EGT's at the tailpipe and are badged with laser-cut aFe POWER plates to finish off the Rebel XD exhaust system for the perfect combination of performance, value and style. Flow and Performance: This Rebel XD Series exhaust system is constructed of 4" mandrel-bent 409 stainless steel tubing and high-flow muffler for maximum flow and durability. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGT's. OE Fit: OE-style bayonet hangers are used to maintain a stable pipe location under any driving conditions. The bayonet tip holds the hanger bushing in place for an OE-style fit that does not change with time. All systems use factory mounting locations providing a hassle-free installation. Leak-Free Seal: High quality band clamps are included for a complete 360-degree sealing surface. Dual 5" Diameter High Temp Black Intercooled Tips: Finishing off the exhaust are Dual 5" straight cut, high-temp powder coated black stainless steel tips with intercooling vents reduce EGT's at the tailpipe and are badged with laser-cut aFe POWER plates riveted on each tip. Note: Some cutting may be required on some cab configurations.