Hey guys i've checked out your comparison page between the diff. exhausts and DB levels for the 2017 STi(nice study!). I was wondering if you knew how this system compares to the invidia R400 catback. I had the invidia on my 18' STi and it droned (vibrated) so bad in the low rpms, so much so that it gave me bad headaches. It was also just a bit too loud for my neighbor hood. i was considering the HKS but am a little hesitant because i dont want to spend $1200 and have the same problems. Any help or info would be greatly appreciated!
