Axle-back System 409S -Dual Side Exit -Force II - After DPF -Mild/Moderate Sound Fits 2011 to 2014 Ford F250 and F350 Super Duty Trucks with a Diesel 6.7L engine. Fits Crew Cab and Short bed (156.2 wheelbase), Extended Cab and Long bed (158 wheelbase) and Crew Cab and Long bed (172.4 wheelbase) models. Mounts after Diesel Particulate Fits Crew Cab and Short bed (156.2 wheelbase), Extended Cab and Long bed (158 wheelbase) and Crew Cab and Long bed (172.4 wheelbase) models. Mounts after Diesel Particulate Filter. Flowmaster's Force II DPF-Back exhaust system for the 2011-2014 Ford F-Series Super Duty trucks is perfect for the person looking for mild to moderate sound levels with all of the performance benefits that you would expect from Flowmaster. This bolt-on emissions-legal system for the 6.7L Powerstroke diesel engine features DOS (Dual Out Side) mandrel bent 4.00 stainless steel tailpipes with 5.00 ventilated 304S stainless steel tips. The system connects behind the factory DPF unit and utilizes a single inlet, dual outlet Power Chamber. It is designed to fit Crew Cab/Short Bed, Ext Cab/Long Bed, and Crew Cab/Long Bed wheelbases only. The exhaust system is manufactured in the USA and is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all of the necessary parts and hardware for installation. Features: Stainless Steel ConstructionDyno Tuned For Maximum Performance Mandrel Bent for Smooth FlowLifetime Limited WarrantyPit Stop USA offers Flowmaster Axle-back System 409S - Dual Side Exit-Force II-After DPF - Mild/Moderate Sound 817644 at low everyda prices. Be sure to check out all of our products from Flowmaster including Flowmaster Ford Truck / SUV Exhaust Systems.