Originally Posted by Yeggman
You've had a dyno that shows 400hp?
I can give you some links on the German Z4 forum. Schmickler custom tunes cars (so with multiple dynoruns to optimize results). 400hp is not rare for 35is models which have no other adjustments from stock. Schmickler does fit additional cooling by the way.
For me I hope they squeeze out just a bit more. I have Milltek straight pipes instead of the secondary cats.