Hey guys so im getting my tune done in a week and i have a question.i have a forge bpv that i didnt put on yet cuz i knew i was getting a tune.so should i wait to put it in right before the tune gets done cuz i dont know which spring to put in it because i dont know what my tuner will set my boost at.or can i just install it after the tune is done or will it mess up the tune.

 

Run ONLY the green spring regardless of boost level.

Is this the vta bpv or recirc? If it's the standard recirc unit then it will not effect the tune at all. If it's the vta then it should be installed right before you get tuned.