The fmf isnt bad when jetted right .But alot of people have said they havent had to jet them at all.When i got my quad it had a fmf and uni filter.It had the stock jetting in it.I didnt really have to mess with the jetting to started adding reeds and stuff. But its a really good pipe for woods riding. But its even got more grunt once you do some trail porting,But it lose  top end after that. But i got the pipe maxed out with all the mods i have on the quad. Im all about helping people out. Their only about 10 or 11 of these pipes out their I want to give anyone whos wanting to upgrade my opinion about my setup When its done..I remember the old site when one of the people on the forum was doing a pipe shootout. He was getting all the pipes and was going to dyno them all. But it got ended before it got finished.I was stoked to see the result of it.But i started this thread so people would have setup choices,so they could make a choice with out investing a ton of money and not getting something they really didnt want . I appreciate all the help thats been throwing my way. I was going to go with the pt pipe. But in the long run it probally wasnt what i was looking for in my quad.Which would have been 600$ mistake.Im sorry if i sounded sarcastic wasnt trying to.But do apologize if i offended anybody.