Not sure which 2004 Ford Expedition Performance Exhaust Systems are right for you? We have over 3905 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"I recently installed the Gibson Swept Side Exhaust and the K&N 77 Series Metal Intake Kit. I notice a slight improvement in responsiveness and power, and the sound is nice. It is a deep, throaty sound that is not obnoxious. The sound in the cab is not significantly different from stock except on acceleration and cruising speeds at 60+ mph. I did not get any mileage improvement on the first tank of gas.Joe, Austin, TX" —William C from Austin, TX bought a Gibson Exhaust Systems for a 2004 Ford Expedition.