Quote Originally Posted by jmmx258
I figured, they sent it with everything, I might as well use it.


Btw, its a garrett, from CXracing
A boost controller turns boost up...if you want to boost 6-7 psi and you have a 6-7 psi spring, you will not be using it and it will be pointless. so no, just because they sent it doesn't mean you might as well use it.