With thirty-five years of experience, Flowmaster has specialized in automotive science and various patent protecting technologies. Ushering a new standard, the brand has shown a revolutionary development in the past few decades. The brand has an aim to design the best automotive products, delivering high-end performance. The highest quality of exhaust products, advanced manufacturing techniques and unwavering dedication toward customers are what set this brand apart from others. Flowmaster Performance has embraced innovative technologies to improve its product line. From its FlowFx straight-through design to legendry chambered, every product delivers outstanding performance.
Flowmaster's American Thunder Cat-back exhaust system for the 2015-2018 Ford Mustang is perfect for the person looking for an aggressive exterior sound level while maintaining a moderate interior sound with all of the performance benefits that you would expect from Flowmaster. This bolt on 409S stainless steel system for the 2.3L EcoBoost engine features 2.50in mandrel bent tubing that splits into dual 2.25in pipes for maximum performance and then runs into Outlaw Series mufflers. The system is finished off with dual 4.00in stainless steel tips that exit within the rear bumper valence. The exhaust system is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation. Note: This system fits hardtops and convertibles.
Cat-back System - 409S- DOR - American Thunder Kit - Mod/Agg Sound.
Fits 2015-2018 Ford Mustang Base, Fastback and Convertible Models with 2.3L EcoBoost Engine. Professional installation by a licensed mechanic required.
Fits Convertible and Fastback
| Brand | Flowmaster |
|---|---|
| Part Number | FLO-817750 |
| Shipping Method | UPS/FedEx/USPS Ground |
| Availability | Possibly special-order. Call or email to check stock. |
| California Prop 65 Warning |
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 This product can expose you to chemicals including lead and chromium (hexavalent compounds) which are known to the State of California to cause cancer and birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov