I got an 01 GSR just like you and i have done a lot of NA stuff to my car, and i may be going turbo, the modifications that i have done are street legal and i have more jucie then a stock type R, my upgrades include, comptech ice box, comptech header, hondata gasket, skunk2 intake, skunk2 stage 1 cams, Apexi N1 exhaust, Apexi VAFC 2, AEM 5 bolt cam gears... but since i am thinkin about turbo i may be selling the cams, the header, the VAFC and the ice box... so if u are thinkin about going that route and u want some really good stuff, let me know if i decide to go turbo i can set u up, i have all the orginal boxes and carb stickers for the cams, header, ice box and all that good stuff..

OH by the way none of that stuff will mix with turbo like shmoo said and u won't be smog legal cause they don't make any street legal turbos for our cars FYI, also if u plan on doing the stuff i have done a VAFC will do u just fine don't need hondata or anythign like that