fmf power core 4 for 1999 xr 80

hey me and some friends wanna order this exhaust but dont have the time to play aound with the jetting. So does anyone actually own this exhaust and did you have to do any jetting? or is it true what fmf says that you dont.

thanks for any help

Altering exhaust doesn't have as much effect as altering intake; not surprised to hear that the manufacturer doesn't recommend jetting. If you've messed with the intake at all (drilled holes in the air box, gone to a pod style filter) then you should rejet.

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