Actually another big problem with the OEM system is the fact that BMW changes the pipe diameter from 60mm down to 55mm after the second "joining" resonator, which restricts flow by ~ 20%.
I am not 100% sure what I want to do now either. I want more volume on wide-open-throttle but I don't want to add drone at highway speeds. A performance boost would be a bonus but it's not my number one priority.
It's hard to make a decision on two YouTube videos. It would be great if someone on the forum who's done the resonator delete could add some feedback.
Straight lines are for fast cars...turns are for fast drivers
'04 M3 - track
'06 650i Cab - daily driver
'02 Highlander - kid hauler
'01 330Ci - winter beater