aFe Takeda 3in SS Exhaust Cat-Back 13-16 Ford Focus ST 2.0L Black TipsThe Scorpion Aluminized Hi Tuck "Rock Basher" (RB) Cat Back Exhaust System is constructed of 2 1 2" mandrel bent aluminized steel tubing. The smooth curves and increased diameter of this exhaust system helps remove restriction and keeps exhaust gas flowing smoothly for increased horsepower, torque and throttle response. This exhaust system also comes complete with a 18" length chambered muffler, OE style bayonet hangers, band clamps and all hardware