You bought the wrong mufflers if you want a loud exhaust. I love the slightly more aggressive sound but this is a very subjective thing. The great thing is there's no drone at hwy cruising. There's no break in period. The sound you have now is the sound you'll have next month.
2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, Koni/M3 susp, Apex Arc 8, Mich PSS