Borla 16-17 Ford Focus RS 2.3L MT Round Angle-Cut Tips Split Rear Exit ATAK Catback ExhaustBorla 16 17 Ford Focus RS 2. 3L MT Round Angle Cut Tips Split Rear Exit ATAK Catback Exhaust This system is equipped with a "Sound Suppressing Valve" simulator which ELIMINATES the valve. This avoids any warning lights on the dash while providing maximum flow at all times. System also features Boryla's Polyphonic Harmonizer Technology which utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes