i have a bbk TB plunum combo and it looks great. there is another thread on in the talk section were someone posted a graph of the gains. I like it and i think its the best bang for bucks if you can sacrifice a polished look.
very true. sorry i didnt mean to come off as rude but ive just never heard of gains that high. Congrats though! Maybe that has something to do with you getting the 70mm instead of the 75mm. Lots of people opt to go with the 75mm because its bigger and better with a blower but realisticly if your car is n/a or not seriously modified the 70mm i think is a better choice...