1/4 track.. i understand that the need for planning is huge in this situation... i would buy a tt if i could but the n/a that i purchased is in amazing condition without any rust what so ever so i would like to keep it.... thanks and keep posting in terms of what i should go with as i am a noob lol.. i know that a turbo upgrade will produce my numbers and that there are many places to purchase them but the reason why the stillen kit looks so attractive is due to the fact that it comes with all of the piping and accessories that i need to due the conversion minus a fmic which i am planning on purchasing