Have a clean 92 325is, i want to boost it. And im not sure where to begin.. 13k-15k to spend on a turbo setup and im not sure where to start asside from a complete engine rebuild and tune up. My goal here is to make a "reliable" 500hp sunday car i can take to some road course events, (time attack). Can i get some insight on where to get internals? My first thought was to go through VAC but im told they are not a reputable resource. Let me know what your builds look like and what the cost was if possible.