anybody got this 4 stroke pipe

May 12, 2010
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wv
okay its a f7 four stroke pipe. yes i have known about this very long. but just thought id post it cause there are no reviews or vids on this pipe and if i get a yfz or 450r i wanna hmf slip on. then for christmas ask for this thing but i wanna know if its good or not before.
Factory Seven ATV - Online Store
 
HMF is a pretty good way to go.

Unless you are going to do some serious racing with a YFZ a slip on will do just fine. The headpipes are really well designed, and a full pipe has minimal gains over a slip on of the same setup.