At work the other day I got this crazy Idea to turn my 02 440 pro-x fan in to a mountin sledI priced out the converson and figured I can do it for less than $1500. The one thing I'm worried about is the lack of HP. I was thinking I could get a set of 500 or 600 twin pipes and bolt them on. Does anyone make twin pipes for a 500 liquid? If not how much does it cost to get custom pipes made??