Flowmaster American Thunder Catback Exhaust (04-08 F150)

Fitment. Designed for your 04-08 F150 with a 4.6L or 5.4L engine*, this Flowmaster American Thunder exhaust is as American as apple pie. Fits all cab and bed length combos with only minor modifications required.

Signature Flowmaster Sound. Uncork your 2004 - 2008 F150's exhaust and get that unmistakable Flowmaster rumble. The American Thunder series is the right choice for the enthusiast looking for a head-turning, moderate to aggressive interior and exterior tone.

Catback Dual Exit Design. A catback design means this system is street-legal.** And just so you can choose the unique look of your system, Flowmaster includes two different pairs of pipes to configure the dual rear exit so that your tips are angled towards the corners or in a traditional straight-back alignment.

Improve HP, TQ, Fuel Economy. The American Thunder series is the most popular series from Flowmaster, offering an unbeatable combination of value, horsepower and torque gains, and increased fuel efficiency. Boost power an average of 5-10% for a difference you can really feel under your right foot.

Quality Construction. The 2.5" aluminized steel pipe used to make this rugged system is mandrel-bent for free-flowing, high-revving performance. Complete with Flowmaster's famous Super 40 Series 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 3" polished stainless, logo embossed tips give this system the trademark appearance Flowmaster is known for.

Easy Installation. When choosing an exhaust, you want a simple, straightforward installation. The Flowmaster American Thunder 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:
  • 2004 - 2008 FORD F-150 V8 4.6 GAS FI
  • 2004 - 2008 FORD F-150 V8 5.4 GAS FI
  • 2007 - 2008 FORD F-150 FX2 V8 5.4 GAS FI
  • 2008 FORD F-150 FX2 V8 4.6 GAS FI
  • 2005 - 2008 FORD F-150 FX4 V8 5.4 GAS FI
  • 2005 - 2006, 2008 FORD F-150 KING RANCH V8 5.4 GAS FI
  • 2005 - 2008 FORD F-150 LARIAT V8 5.4 GAS FI
  • 2008 FORD F-150 LIMITED V8 5.4 GAS FI
  • 2007 - 2008 FORD F-150 STX V8 4.6 GAS FI
  • 2005 - 2008 FORD F-150 XL V8 4.6 GAS FI
  • 2005 - 2008 FORD F-150 XL V8 5.4 GAS FI
  • 2005 - 2008 FORD F-150 XLT V8 4.6 GAS FI
  • 2005 - 2008 FORD F-150 XLT V8 5.4 GAS FI
  • 2004 FORD F-150 HERITAGE V8 4.6 GAS FI

Installation Instructions

Flowmaster American Thunder Catback Exhaust System (04-08 F150 4.6/5.4L) - Installation Instructions!