A few years ago I bought the AFX udp and an AEM cai and got a good gain in power, I was impressed. Right after that I bought the 5zigen fireball exhaust and not much of a change to be felt there. I bored the tb to it's limit and it gave a decent gain. So just a couple weeks ago I had the head off the motor and ported it. I noticed a small gain in lower rpms and that was about it. I've been working on porting and polishing the inside and outside a spare intake manifold off and on over the past 6 momths and finally finished it and threw it on. I lost some high end power but gained a little down low. Thinking that mt stock exhaust manifold could easily let out everything coming through the motor I was going to leave it that way. I changed my mind and bought a Greddy header expecting nothing for a gain and boy was I wrong. All I can say is holy shit, I would have never thought I could get that much of a gain without more serious mods. The only thing I have to compare it to is when I put on the udp and cai at the same time, but I got a little more with the header. I also threw on an UR upd but no change compared to the AFX. Btw I have a 97 gs that I managed to get the weight down on from 3125 down to 2820 and now to 2729 with a full interior and a couple gallons o gas.
