Flowmaster Force II Catback Exhaust System (99-04 SuperDuty 4.6/5.4/6.8)

Fitment. For your 99-04 Super Duty with a 4.6, 5.4, or 6.8 liter engine, there's no better choice of exhaust if you want big efficiency and power gains with only a moderate increase in the volume of your exhaust tone.

Big Gains. The Force II series gives you all the performance you've come to expect from Flowmaster with only a mild interior tone, and a mild to moderate exterior volume. You'll enjoy an average of 5-10% more power for greater acceleration and passing power. But don't worry - unlike the American Thunder series, this system won't compete with the sound of your awesome sound system at cruise.

Perfect for Towing. Keep everything quiet on the home front when you're towing with this system. It's the perfect choice for the power gains and for the fact that you won't blow the windows out of your RV.

Catback Single Rear Design. A catback design means this system is street-legal.* And if you want an understated custom look, this system definitely delivers - the single out side (SOS) design of this exhaust exits the rear of the truck at an angle towards the corner for a subtle sporty touch.

Quality Construction. The 3" aluminized steel pipe used to make this rugged system is mandrel-bent for free-flowing, high-revving performance. Complete with Flowmaster's famous 70 Series Big Block II chambered muffler, this system is backed by Flowmaster's 3 year warranty so you don't have to worry once installing it on your truck. And as if that weren't enough, the massive 3.5" polished stainless, logo embossed tip gives this system the trademark appearance Flowmaster is known for.

Easy Installation. When choosing an exhaust, you want a simple, straightforward installation. The Flowmaster Force II series contains all the parts you need, including band clamps and hardware, for a simple installation with a minimum of cutting.

Tech Notes:

• *Not guaranteed, please check your local laws.

Fitment Notes:

• *Fits the following:
  • 1999 FORD F-250 V8 4.6 GAS FI
  • 1999 FORD F-250 V8 5.4 GAS FI
  • 1999 FORD F-250 SUPER CAB V8 4.6 GAS FI
  • 1999 - 2004 FORD F-250 SUPER DUTY V8 5.4 GAS FI
  • 1999 - 2004 FORD F-250 SUPER DUTY V10 6.8 GAS FI
  • 1999 - 2004 FORD F-350 SUPER DUTY V10 6.8 GAS FI
  • 1999 - 2004 FORD F-350 SUPER DUTY V8 5.4 GAS FI

Installation Instructions

Flowmaster Force II Catback Exhaust System (99-04 SuperDuty 4.6/5.4/6.8) - Installation Instructions!