Which exhaust should I buy??

NRGz

That was my second option if no one had a used ark or motordyne up..
A friend put one on his 335i, sounds nice at start up then slowly goes down in sound. I decided against due to me wanting a little more bass with VQ sound.

But anyways, to OP, I have an ARK grip on my 09, stock cats. No drone when cruising in the upper gear. Sound doesnt come till 3k.
But when your slowing down there IS that slight drone from about 4k(if your that low or high) to 2k. I like it IMO.

I have a 7at too so i cant say anything about slowing down with the clutch in.

ARK grip
Fitment: Some people have it good.. others have some fitment issues being the tip sticks out a little more on one side. I guess a hit or miss? I got mine used. And yes it is off there.
Sound: smooth vq at certain rpms. Opens up after 3k. If i can remember, there decibels were in the 80s on start up, don't quote me on that if your state/county has a thing for it.. and if you follow it.
Quality: 9/10 due to fitment issue i mentioned. ALSO sits pretty low so if you are lowered from stock Id ask others that are lowered with this set up..

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