Throttle Body?
 

I'm thinking of buying a BBk Throttle Body, and upper plenum kit. The one i see for sell is 75mm. But alot of people tell me not to go over 70mm. I am new to this and have no idea what to get.

I run a 75 mm with no issues.

I was told that 75mm was only good for heavy modified motors.

ive heard mixed reviews, some have problems, some dont.
go with 75, youll be alright. ive got the 70 and wish I did 75 for the 10 dollar difference...

Mine is not heavily modified. Pullies, headers and the plenum. I have never had any issues from the day I installed it.

im running the 75mm bbk with out any heavy mods and i think its great, besides down the road if you do decide to go with forced induction youll end up getting the 75mm anyways

Yes, go with with the 75MM...