[FrostyM550]

So I purchased my '18 M550 a few month ago and instantly started modding because...well....why not?

First thing I did was delete the resonators for more sound not thinking I'd be doing catless downpipes any time soon. Well that lasted about a week or two before I came across a deal on the downpipes so on they went along with a BM3 Stage 2 tune.

Here's my problem and I'm hoping someone with the same experience can help. Below 3k RPM's and at 1/4 throttle the exhaust sounds so good...but anything more than 1/4 throttle and 3K rpm's it's rasp city...it's loud which I don't mind but my God...the rasp. You can hear the exhaust notes bouncing around in the muffler. For those that had this set up did you experience the same thing? Do you guys think putting the resonators back on will help or is there another suggestion out there?

Thanks guys!