hsckris wrote:I don't think it'd be worth your time & effort.
You'd be better served by pulling the intake and porting it, port-matching it, and maybe even extrude honing it. I think that or replacing it with a high performance manifold (if available) would be much more worth your while.
Your best bet for performance manifolds is to buy the 4th gen MEVI that was on all euro and jdm spec cefiros. Honing and porting it really cuts down the mpg and a MEVI will give you near the same results
hsckris wrote:Same for cams. I know JWT makes cams for it.
JWT cams are longer and have a shorter lobe. This cam profile is great for mid and top end but cuts down the low end. This setup might work in a 5-speed but i don't think this would work in an auto