[Pontio]

Hi every1, this is the first topis im starting rather then just replying to others, hope you can help me out. I am the proud new owner of a 2006 Z4 coupe 3.0si and would like to get it upto or at least closer to the 300bhp mark. it is the N52 engine so already has 260-265bhp depending on what sire you look at. I dont want to touch the exhaust as i dont want it too noisy or obvious its been "played" with. Spoken to a few different companies and there all fairly confident in getting between 15 to 20bhp out of it. However that still leaves me a bit short of 300ish. I was looking at the simota carbon cai's which can give upto 10bhp apparently however they are only for the M54 3.0. Any ideas where i can get a decent cai or anything suttle for a bit of help to get closer to 300BHP? I'm in the uk btw so delivery charges might be silly from abroad.
Thanks for any help