Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is engineered for 2009-2014 Ford F-150 owners who want a bolder exhaust note paired with real performance gains. Built around Flowmaster’s proven American Thunder series, this bolt-on system delivers a moderately aggressive sound both inside the cab and outside the truck, giving your F-150 a purposeful voice without droning your daily drive into submission. It fits trucks equipped with the 4.6L, 5.0L, and 5.4L engines.
At the heart of the system is a Super 40 Series muffler that flows into dual 2.50-inch mandrel-bent tailpipes for maximum performance and sound. Every section is crafted from stainless steel mandrel-bent tubing, preserving smooth, unrestricted flow through the entire path from the 3.00-inch inlet to the exits. The system finishes with large 3.50-inch polished stainless steel tips that add an aggressive, high-quality look at the rear of the truck.
Sound and Performance
Flowmaster tuned this American Thunder configuration to hit the sweet spot: aggressive enough to announce your truck’s presence, yet moderate enough to live with every day. The Super 40 Series muffler and dual outlet design work together to deliver the throaty tone F-150 owners expect while unlocking the performance benefits that come from a free-flowing, mandrel-bent cat-back layout.
Exit Options and Fitment
This is a DOR/DOS system, meaning it supports dual-out-rear or dual-out-the-side tailpipe exits, so you can set up the truck the way you want it. It is designed as an easy, at-home bolt-on install and includes all necessary parts and hardware. The system is emissions legal and CARB (California) compliant, making it a smart choice for owners in emissions-regulated states.
- Fits 2009-2014 Ford F-150 with 4.6L, 5.0L, or 5.4L engines
- All stainless steel mandrel-bent construction for durability and flow
- Super 40 Series muffler with dual 2.50-inch mandrel-bent tailpipes
- Large 3.50-inch polished stainless steel exhaust tips
- DOR/DOS dual-out-rear or dual-out-side exit options
- 3.00-inch inlet diameter; emissions legal and CARB compliant
- Fits 2/4 wheel drive and all wheelbases
- Backed by Flowmaster’s Lifetime Limited Warranty
Why It Works
From the mandrel-bent stainless tubing to the aggressive-yet-livable Super 40 tone, this American Thunder cat-back is a complete, ready-to-install upgrade for your F-150. Choose the exit configuration that fits your truck and enjoy a bolt-on system that pairs classic Flowmaster sound with dependable stainless construction and a Lifetime Limited Warranty. Note: This system is intended for California Proposition 65 warning applicability; see product warnings for details.
