I have a 5speed 96 gt with cold air, underdrive pullies, nos fuel pump, 373 gears, and full exhaust and the thing is slow! it has about 120k on it. I want it faster but i am not confident enough to do a PI head swap, i know i could do the intake and maybe cams. Is the intake actually worth it? i've heard it adds about 15hp but i want to hear from you guys what your experiences have been with PI intake swaps.