I have a set of IF FMFs I'd sale to only a experienced rider. These pipes make about 13-14 hp more than any pipe on the market, tested on a professional butt dyno. My 4mm Serval Ran .02s with them, the sand literally will turn into glass from the velocity and heat that your paddles will make when spinning. Faces have completely melted off from running these pipes without a full face NASA approved helmet on. There is a good possibility you might be timed warped into the future or past from the incredible speeds you will see running these custom pipes. Custom grips with straps holding you to the bars are required and I might be willing to let mine go with the sale but only to a very experienced rider. My Banshee runs 180 KPH in 1st gear with the pipes. So if you want "The Best" pipe on the market for any application, then PM me your references so I can verify your experience and will decide who is deserving of the monsters. I also am not responsible for any deaths or disappearances from the use of the pipes once they are out of my possession.