Exhaust› Exhaust Pipes, Systems and Components

Flowmaster

American Thunder Cat-Back Exhaust System 1998-2003 Ford F-150 With 4.6L Or 5.4L Engine Fits Both 2/4-Wheel Drive Models Aggressive Sound Flowmaster

$1,343.84

SKU: F00L 817663

In Stock
In Stock
Ships by Jun 12
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Flowmaster's American Thunder Cat Back exhaust system for the Ford F-150 pickup truck provides an aggressive exterior sound level and performance benefits. This bolt-on 409S stainless steel system fits both 4.6L and 5.4L V8 engines, featuring a Super 40 series performance muffler and dual 2.50-inch mandrel-bent tailpipes, finished with large 3.50-inch polished stainless steel tips. It's designed to fit all 2/4 wheel drives and all wheelbases and includes all necessary parts and hardware for easy installation.

Fitment

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Specifications

BrandFlowmaster
Part NumberF00L 817663

Videos

1998-03 Ford F-150 4.6L, 5.4L - Install: Force II Cat-back Exhaust Systems 17472 , 817472

1998-03 Ford F-150 4.6L, 5.4L - Install: Force II Cat-back Exhaust Systems 17472 , 817472
Flowmaster American Thunder Exhaust 1999 5.4L F150

Flowmaster American Thunder Exhaust 1999 5.4L F150

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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