Borla 2023 Integra/22-23 Civic Si 1.5L 4 CYL. MT FWD 4DR 2.50in S-Type Catback Exhaust Black ChromeThis Borla(r) Cat Back(tm) system for the Acura Integra and Civic Si is designed specifically for these vehicles. The 2. 5" diameter system 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 a clean, rich, full bodied sound to the Borla(r) mufflers. The muffler then enhance this sound to the character and