I messaged CV Fab again today for further clarification.
My message;
Good morning Cristina. With the 25' ST, are both hot and cold side piping required to get everything to fit, or just the cold side or just the hot side? I am looking to get only the intercooler and whatever else is absolutely necessary for it to fit properly. I don't want to buy anything I do not need.
CV Fab Reply;
Yes, for the 25 models the hot and cold side pipes have to be purchased for fitment as the pipe connections have changed from the previous model years.