Ok i just got finished installing PI cams. My car feels really good until about 3500 then it just seems to stop making power.... I have a really open art exhaust no cats kooks headers and flows on the rear. My intake is a 99 gt intake tube with a 80 mm lightning mass air sensor K&N filter....But i have a stock T/B and stock plenum and a stock intake manifold! My tune was set for a single exhaust and 3.27's ( i currently have 4.10's) So first off i know i need a tune really bad.....but is it possible that with all the good exhaust flow and pi cams and good intake that my stock NPI intake manifold and maybe the plenum are maxed out as far as flowing any better on a N/A motor? If it definetly is then i will be ordering one soon.....as well as a reburn.....what do you guys think?