k04 tune $2500 https://www.getunitronic.com/parts/turbos---pulley-kits/20l-tsi-gen2-k04-kit
intercooler + downpipe $694 http://www.armmotorsports.com/MK6-GTI-GOLF-R-Front-Mount-Intercooler-p/mk6-fmic.htm
cold air intake $260 http://www.neuspeed.com/243/11/0/1491/651091-neuspeed-p-flo-air-intake-kit.html#popUp[products]/4/