2012-2017 Focus 3" Cat Back Exhaust System ROUSH 421610 Fits all 2012-2014 Focus models; Fits 2012-2017 Focus ST High-flow 3" cat-back system made from 409 stainless steel Dual, round 304 chrome tips with rolled edge and Roush logo Includes performance-flow muffler; Uses the same factory mount locations Includes all necessary clamps and hardware for installation