Description
Overview
The Flowmaster American Thunder cat-back exhaust system is engineered specifically for the 1998-2003 Ford F-150 pickup equipped with the 4.6L or 5.4L V8. Built for the owner who wants an aggressive exterior tone backed by real flow, this catback exhaust delivers the performance benefits you expect from Flowmaster while bolting on with all of the necessary parts and hardware included. If you’ve been comparing a Borla exhaust, Corsa exhaust, or Magnaflow exhaust for your truck, this American Thunder kit brings Flowmaster’s signature attitude to your F-150.
Sound and Performance
At the heart of the system is a Super 40 Series performance muffler, tuned for an aggressive sound level that announces your truck without overwhelming the cab. Dual 2.50-inch mandrel-bent tailpipes keep exhaust gases moving efficiently, and the whole performance exhaust setup is finished with a pair of large 3.50-inch polished stainless steel tips for a clean, purposeful look at the back of the truck.
Configuration Options
This exhaust system gives you a choice of exit style to match how you use your F-150. Select dual out-the-rear exit tailpipes for a traditional look, or choose dual out-the-side exits behind the rear wheels — an ideal setup when you tow. Whatever exit you pick, you get the same 409S stainless steel construction and Super 40 muffler for lasting durability and a consistent, aggressive note.
Fitment
Designed as a true bolt-on, this car exhaust upgrade fits all 2WD and 4WD configurations and every wheelbase of the 1998-2003 F-150 with the 4.6L or 5.4L engine. It is CARB (California) compliant, so it’s street-legal even in emissions-strict states, and it ships with everything needed for a straightforward installation of the exhaust pipe assembly.
- Flowmaster American Thunder cat-back exhaust system for 1998-2003 Ford F-150
- Fits both 4.6L and 5.4L V8 engines, all 2WD/4WD models and wheelbases
- 409S stainless steel construction with dual 2.50-inch mandrel-bent tailpipes
- Super 40 Series performance muffler for an aggressive sound level
- Your choice of dual rear-exit or dual side-exit (great for towing)
- Large 3.50-inch polished stainless steel tips
- CARB compliant and covered by Flowmaster’s Lifetime Limited Warranty
When you shop for exhaust that transforms your F-150’s tone and looks without sacrificing bolt-on convenience, this Flowmaster American Thunder system delivers. Every exhaust pipe, tip, and piece of hardware is included, so you can add a genuine performance exhaust to your truck with confidence. Note: this system carries a California Proposition 65 warning. Choose the exit configuration that fits your needs and give your F-150 the aggressive, durable exhaust system it deserves.
