Ok well I finally got an appointment for a dyno tune with evolution performance, but they are telling me I need a boost a pump. Do I need one if I have the m90, 2.55 pulley, longtube headers, and o/r x pipe? I see alot of people that have basically the same setup (vmp500 kit) that arent running a boost a pump. It was another $250 that I really didnt want to have to spend. Maybe I should just stick with the m90 and headers with a dyno tune. I mean I do have 4.10s so that is a big boost right there.