The Flowmaster Force II Cat-back exhaust system for 2003-2006 Ford Expedition with V8 engine is perfect for the person looking for a moderate exterior sound level while maintaining a mild interior sound with all of the performance benefits that you would expect from Flowmaster. This bolt-on aluminized steel system features 3.00 in. mandrel-bent tubing flowing into a large 50 Series Big Block performance muffler, exiting into a 3.00 in. tailpipe that's finished off with a large 3.50 in. polished 304 stainless steel tip. This system uses the factory hanger locations and fits 2 & 4 wheel drive models. Covered by our 3-year Limited Warranty and includes all necessary parts, hardware for installation and easy to follow instructions.