BMW 325i E90 exhaust muffler delete sound HD

Bmw E90 325iA 160kw muffler delete - drive, sound clip, start up, rev. The exhaust was made to be easily reversable. Basically only the rear muffler was deleted and replaced with a straight pipe. All the cats and resonator are still there. The sound is actually quite nice, taking into account, that the mod cost me 60€. Inside the sound was a little irritating at first, but after driving with it for a week, i would not change it back. The main problem is the drone, which comes at around 2,5-4k rpm. Form start and above 4k rpm the sound it is almost perfect. But i can live with the drone at 3-4k (will keep me under 3k and also save some fuel :D).