3-Inch Cat-Back Exhaust System

The COBB Tuning 3" Stainless Steel Dual Tip Cat-Back Exhaust System is designed as a direct replacement for the 2013-2018 Ford Focus ST. Constructed entirely from 304 stainless steel, it features 3-inch diameter tubing and dual 4-inch double-wall tips, offering a distinctive and drone-free exhaust note. Installation is straightforward, making it an accessible upgrade for Focus ST owners seeking improved sound and performance. This exhaust system is noted to be part of the COBB Stage 3 Package. While it provides a significant upgrade over the factory exhaust, COBB recommends pairing it with a downpipe for further performance enhancement, noting that the combination can increase volume. For the 2015 Focus ST, which has only three factory exhaust hangers despite having mounting points for four, it is recommended to purchase COBB's Polyurethane Exhaust Hanger Kit (sold separately) to ensure proper installation and prevent movement. Hardware and installation instructions are included.