Ok guys so I got some mods finally going for the car, got the mtech front coming in, painted my front grill with plasti dip and suprisingly it looks pretty good, plus oem fitment. Got the led angel eyes.

Now I am looking at sound, I just hate how quiet the 535i is. Been looking at videos on youtube, the b&b exhaust and the mangaflow seem to be at a decent price.

What do you guys think, anyone have one of these installed, where did you buy it, how much etc. How is the sound, any problems etc.