I already have the MD done and with Headers planned I don't expect to be messing with a new exhaust setup until after they are done. Resonator delete with the stock muffler won't do much for sound or performance. The secondary cats in conjunction with the resonator has a more noticeable gain/sound difference.
E92 '08 335Xi 6AT - JB4+MHD, ar design DP's, Race Cats in the mids, Corsa Axleback, VRSF CP w/Tial BOV, VRSF 7" FMIC, BMS DCI, BMS Cowl, H&R Coilovers, Renn Motorsport RS-51's, Alpina TCU Flash, Retrofit Earl's Oil Cooler, Turner Boost Gauge, Fully Coded.
Upcoming: DOCRace Single Turbo
Best 1/4mi: 13.201 @ 106.93 / 2.0 60' / DA=9300ft Bandimere Speedway