Borla 2023 Honda Civic Type R MT ATAK Catback Exhaust w/ 4in Black Anodized Carbon Fiber TipsThe 2. 75" diameter Borla(r) Cat Back(tm) system for the Civic Type R contains an Active Exhaust Valve that allow your vehicle to retain the factory designed valve operation. Includes Wiring Harness Extender for Active Exhaust Valve Actuator. The system also features Borla(r)'s Polyphonic Harmonizer Technology which utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes that harmonize to deliver