I used PVC pipe, PVC elbow and a rubber attachment to fit to the air box to replace mine as the factory stuff was leaking bad, got all the stuff of a mate who's a plumber so it cost me nothing but wouldn't cost much to make if you had to buy it all. Looks abit crap as it's just grey PVC pipe but does the job Been meaning to give it a spray with some black paint but haven't done it yet, it's been on there for 2 years and holding up fine. I'll try and get some pics up tomorrow for you.