if BBR have a 275hp mini up there sleeve then i would think that it is possible.... if u dont trust them then thats a different case.. wait for Hamann, Hartge, other companies to join in the 250hp+ parrade and then you will get peace of mind.
dont forget that some of us have a goal of 300hp+ on our mind and this will proove that this baby can stand all of this abuse.... i mean just drive a standard S and tell me that it feels right, it gets better as u
mod it, but u will have to get it handling pretty well before u give it a huge dose of HP.
u will have to wait.. the used car market takes time to get going and then u will have people moddding the MINI.
ignore this crap above if it isnt helpful.