S4 Reliability when modding???

Hello...I'm new to the forums because I'm looking into getting a '01 or '02 S4 in the next couple of months and I want to learn more about them. I currently drive a 2001 BMW 330i and I've been on DTMpower.net and Bimmerforums for a while and I've noticed that there are some posts about S4's and whenever modding comes up with S4's reliability has been a problem. What kind of problems can I expect because I plan on modding it quite a bit. I want to be in the 400hp range within the first year of having the S4. So, what can I expect if I mod the S4 as far as problem wise? All help is appreciated. Thanks!

 

Tom

well , if you want to be in the 400 hp range you`ll need K04 turbos and the small K03 turbos are what fail on that car when modding. So would suggest a clutch. $$$$$$$$$$$$ You`ll need a nice sum of it..

and suspension

and brakes