Depends on how much hp your looking to make. Revhard, Fmax, Drag, all have turbo kits. Most of them also come in stages which you can upgrade to as well. As for superchargers Vortec has a kit out for civic si's and Integra gsr's. They both have their pros and cons but turbos have a little more maintenance but it tuned properly you can make more power than a supercharger since the sc is only belt driven.. the turbo is powered through exhaust gases and thats what propells the turbo to spin thus making more power by just adding boost.
It's a little more than that...but its hard to compare the two with only a paragraph of explanation. Buy ya, it depends a lot on how and if you plan on keeping up with the maintenance and tuning. Just do your research and know your shit before you go out and buy anything. Good luck.
A forum community dedicated to Honda and Acura owners and enthusiasts. Come join the discussion about performance, modifications, concepts, reviews, classifieds, troubleshooting, maintenance, and more!