Sounds amazing, however if you already have test pipes I wouldn’t recommend it as it didn't really gain anything worth the price point. I had art pipes, and a few other bolt ones and made 292 RWHP before I installed these. After installing them the car sounds amazing, it has a much deeper tone compared to how it was before, it does have some rasp now even with the motordyne exhaust, so I imagine other exhausts might be worst. After a retune I had 301 RWHP on a Dyno dynamics.