Ok guys, hope you can help me out with this, I own a 2001 audi tt 180 fwd 1.8, I want to upgrade de turbo to a K04, I would like to know if this turbo is a bolt on, or do I have to order extra parts to make it fit?? I mean I dont want to order the turbo and then be on the shop and be told by the mechanics "OOOOH IT WONT FIT CUZ IT LOOKS LIKE IT NEEDS A DIFFERENT MANIFOLD" or somethin like that, remember my TT its a 180 fwd non quattro, by the way once I installed the new turbo, beside a new downpipe and a dv, what else do you recommend to get extra HP? I heard something about a N75 valve that can be changed for a better one, thing is Ive been looking for a N75 on ebay and I cant find anything but OEM valves, any links??

 

ko4-001 is a bolt on, but pointless upgrade
k04-20 from the 225 isnt a bolt on, but a mild upgrade. please read stickies for more info along with the search function

 

I will have my OEM ko4-20 setup (less than 60k miles on it) from my 225 ready to sell in a few weeks when I install my new setup.

I'll have the turbo w/lines, manifold, injectors, 42DD DP w/cat... just to let you know

 

Not so pointless if my K03 is almost dead right?? I mean Im looking for a new turbo and I was thinking that since Im going to do all the manouver of changing the turbo it could be a good thing to put in something that could not only give me back my car but also give me a few extra HP. By the way If I decide to change the inyectors, what CC would you recommend to have a better response?

 

Just spend $150 and get a used ko3s off vwvortex. THese turbos last forever unless pushed beyond their limits. A ko4 isnt going to net you more than a couple hp. Not worth the $750 investment