I'm about to sell my 2012 GTI and make about 2~ grand, and I want to do an NA-T build. I'm shooting for about 450 hp and I have around 10k, including car purchase, to build the beast. I'm able to do almost all the work by myself but I need a little advice on whether to keep the stock 5 speed, what turbo kit to use, and what supporting mods it would need. Any other advice would be cool too.

 

Stock 5-speed will grenade at that power level. CD009 will cost you at least $4k installed if you do it yourself.

Build your own turbo kit, tread stone cast manifold, precision 6266 turbo, CXRacing intercooler kit, GTE ECU Mod w/440cc Injectors, Walbro 450 fuel pump w/relay. That should get you started.