flattire

Hey guys I was wondering if you guys could help me out. I have an m2 performance axle back exhaust with a resonator delete. I'm looking for a less drone from 1k-3.5k rpm so I'm in the market for a manga flow resonator, seeing as if I just put on the stock resonator you still get drone. Do any of you guys have a manga flow resonator? Or any aftermarket resonator for that matter? I have no idea what size to get either if I were to get one. Any input would be awesome thanks!