[crypto]

I have MAD secondaries and Fi catback exhaust (which keeps valve functionality too). Looks great. Sounds OK. I’ve heard a few different exhausts on the F90 and none of them knock my socks off. I think it’s the nature of the car. Sounds OK but not amazing regardless of what exhaust from my experience. Keeping the valves is nice. Super quiet when you want it. I’d imagine prob the same effect across exhaust brands. I’ve had some people argue with me on here but thought my M550i’s exhaust sounded better. Prob all preference. Listening to clips online also does no real justice so it’s hard to really make decision based on anything but price, looks, valve functionality, and opinions unless you can hear it first hand. Good luck. 😄