Bhp

I had an Alfa 33 1.7 IE that i modified the induction on it and put a FSE Powerboost valve on it, it made the car very responsive and more willing to accelerate, engine ran quite strong, it didnt use any more fuel than it did before i fitted it because your mainly increasing the fuel pressure so that injectors squirt with more force and quicker, it also worked well with my Fiat Bravo, but i havent been brave enough to try it on my GTV or 147, just got them both mapped instead.

About BHP increase, it was a little more responsive no where near 12BHP extra, the difference is like running V Power instead of normal petrol, that kind of scale of difference.