I'm looking at purchasing a w/i kit from yall. I have a couple of questions to help me get a better understanding. Is the difference between a normal kit and a progressive kit that much of a difference on my car? Mazdaspeed Protege 2.0 T25 running 6-10 lbs of boost. I have a fuel controller and will be able to tune my car but do I really need a
Progressive Controller?
Thanks Guys,
Chris