Description
Overview
The Flowmaster Flow FX Cat-back Exhaust System is a bolt-on, emissions-legal upgrade engineered for the 2009-2021 Toyota Tundra equipped with the 4.0L, 4.6L, 4.7L or 5.7L engine. Built to replace your restrictive factory piping, it delivers a moderately aggressive exterior sound paired with a moderate interior tone, so you get real presence at wide-open throttle without an overwhelming drone inside the cab.
At the heart of the system is the specially designed dual-inlet Flow FX “straight-through” performance muffler, which flows into dual 2.50-inch mandrel-bent tailpipes for maximum flow and consistent performance. Every component is crafted from 304 stainless steel for long service life and corrosion resistance, giving your Tundra an exhaust that looks and sounds the part for the long haul.
Key Benefits
The tailpipes exit out the sides behind the rear wheels — a configuration that’s especially beneficial for towing, keeping exhaust routed cleanly away from a trailer. Each pipe is finished with a large 4.50-inch black ceramic coated stainless steel tip featuring the embossed Flowmaster logo, delivering a bold, aggressive look that complements the truck’s stance.
- 304 stainless steel construction for durability and corrosion resistance
- Dual-inlet Flow FX “straight-through” performance muffler (24.00″ overall length, dual 2.50″ outlets)
- Dual 2.50-inch mandrel-bent stainless tailpipes for maximum flow
- Side-exit routing behind the rear wheels — ideal for towing
- Large 4.50-inch black ceramic coated stainless tips with embossed logo
- Moderately aggressive exterior sound with a moderate interior tone
- CARB (California) compliant and emissions legal
Easy At-Home Installation
This complete kit includes the muffler and all necessary parts and hardware for a straightforward, at-home bolt-on installation. The system mounts using the factory hangers, so there’s no cutting or fabrication required to get the Flow FX exhaust in place and dialed in.
Fitment
Engineered specifically for the 2009-2021 Toyota Tundra with the 4.0L, 4.6L, 4.7L or 5.7L engine. The dual tailpipe, side-exit design is purpose-built for this platform, ensuring proper alignment with factory mounting points and a clean, integrated appearance.
Backed by Flowmaster’s Lifetime Limited Warranty, the Flow FX Cat-back gives you the confidence of a proven straight-through design, premium stainless materials, and an aggressive tip package — all in an emissions-legal system built for daily driving and towing duty alike. Warning: This product can expose you to chemicals known to the State of California to cause cancer or reproductive harm (California Proposition 65).
