Borla's exhaust system with polyphonic pipes are available for the Focus RS, Fusion Sport, Challenger R/T, and Infiniti Q60S, BMW M3/M4, Honda Civic Type R, and Kia Stinger.
http://www.motortrend.com/news/borla-pipe-organ-tech-gets-your-car-riffing-like-acdc-technologue/