You'll need ~360 flywheel hp (305 whp) to have a similar power to weight ratio as a C6 vette (non-Z06). That can be done with supercharger or turbo. There are several RSX-S owners with the Jackson Racing SC w/ 9psi pulley + supporting mods and Kpro that are making that kind of power, and there are people with turbocharged RSX's making even more than that. I don't think Kpro is available for the new Si yet but it'll probably come soon. Jackson Racing does have a SC kit available for the 06+ Si, but not sure about turbo kits. If you decide to go the turbo route, THE turbo kit to get is from Full Race (http://www.full-race.com/). Doesn't look like they have a kit for the 06+ Si, but I'm sure they will come out with something eventually.