2013-2018 Ford Focus ST EcoBoost Flowmaster American Thunder Cat Back Exhaust System 817637

Deep, Aggressive Sound with Decent Power Gains

One of the ways to pump some fresh life into your 2013-2018 Focus ST is with a performance cat-back exhaust system. This complete cat-back kit from Flowmaster uses more efficient tubing and an aggressive resonator design to get your ST an awesome sound and some more power going to your front wheels. The Flowmaster Focus ST cat-back kit bolts right up in place of your stock exhaust system and has a center rear exit design so you don't have to do any trimming or other modifications to your rear valance. Flowmaster's kit features a loud, deep tone that will set your 2013-2018 Focus ST apart from the rest.

Includes 2.25" Tubing, Resonators, and Polished Tips

Flowmaster builds each of their Focus ST cat-back kits out of high-quality 409S stainless steel to help prevent corrosion and give you reliable performance. This Focus ST exhaust system is part of Flowmaster's American Thunder series of exhausts that are built specifically for aggressive sounds and excellent gains. Each of these kits use 2.25" diameter tubing that's all mandrel-bent to ensure smooth flow and reduced back pressure over stock. The kit comes with a full set of tubing, resonators, and two 3.25" polished tips. Flowmaster includes hardware and detailed instructions.