Originally posted by Bo_Vien
Header - without question, the race header (where the catalytic converter is eliminated) will yield the best gains. Jackson Racing, Comptech, Toda are some that come to mind. Of course, we all know that's an environmental no no, and should you be caught, the police don't take too kindly to the fact that you decided to go cat-less. We're talking big fines here. But if you're not getting the race header, don't bother with the 4-2 header. From what I've heard the yields are very minimal, and depending on what brand you buy, they tend to break.
i thought the current headers out there were just as worthless as the exhausts?
and as for the CAI installation, they all seem to perform fairly well but Injen's is rumored to produce more torque (same hp) than their competitors... this is all speculation, hehe, but its widely perceived that intakes do a lot more for the RSX-S than they ever have for other 4-cyl hondas, so don't be too critical of claimed gains
from what i remember i think the AEM CAI was the first to come out, and does require removing the front bumper.. its no big deal, but its just an added hassle considering you ALSO have to permanently remount your windshield wiper fluid reservoir bottle somewhere else... the DC CAI came out after that and provided a replacement windshield wiper fluid reservoir bottle that fits in the stock location, but apparently suffered from some poor workmanship and leaks... the Injen CAI should also require no relocation of anything or removal of the front bumper, and will have a better-crafted wiper bottle, along with supposedly more torque gains hehe
as for the comptech icebox, it was a semi-cold-sorta-short tube intake but has supposedly halted development pending a redesign, don't hold your breath, injen's cai looks a lot more promising and will be available a bit sooner
and for suspension, i'd say stick with stock (minus maybe a thicker rear sway) until someone gets some shocks out or the H&R cup kit finally gets released