The Roush Performance Dual Rear Exit Cat Back Exhaust is the perfect upgrade for your F-150. This is the most aggressive, highest flowing, and loudest exhaust system that Roush offers. Sound levels at high RPMs may exceed local noise ordinances. Roush Exhausts are made from stainless steel and are finished with a chrome flashing process. The exhaust tips are embossed with the Roush logo. Roush Exhausts are completely bolt on and can be installed with minimal effort. All necessary hardware and instructions are included. The part number for this item is Roush R12000007 and it fits 2004 Ford F-150 (4.6 and 5.4 V8 Models) 5.5' Bed Super Crew and 6.5' Bed Super Cab models.