Bolt on an American tradition with Flowmaster Cat-Back Exhaust Systems. The throaty roar and performance gains of these performance exhaust systems are unmistakably Flowmaster. Built from aluminized or stainless steel. 3-year & limited Lifetime Warranties.
Unleash the horsepower demons lurking under your hood with a power-packed Magnaflow Cat-Back Exhaust System. Engineered for unrestricted flow and a throaty growl, Magnaflow Cat-Back Exhaust Systems are all wrought from prime 409 stainless steel for lasting durability. Lifetime Warranty for Magnaflow Cat-Back Exhaust Systems.
The affordable cat-back exhaust that doesn’t compromise on horsepower muscle or tough torque is none other than Gibson Cat-Back Exhaust Systems. Mandrel-bent piping cuts the backpressure out of your cat-back exhaust system, and the SuperFlow mufflers keep the rumble tasteful. Built from aluminized steel or 409 stainless. Lifetime Warranty.
For an immediate boost in performance with your choice of mild or wild exhaust tones, turn to Heartthrob Cat-Back Exhaust Systems. These single-exit cat-back exhaust systems come in your choice of Turbo (aggressive) or Welded (mellow) mufflers. Mandrel-bent aluminized steel. 1-year warranty.
Not sure which 2004 Ford Expedition Performance Exhaust Systems are right for you? We have over 7601 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.