a pro circuit has been proven better than FMF
yea with port work..were talkin about the pipe itself
"Yes, a pro circuit it better than the FMF fatty. If i were you however and were buying it brand new, i would get something a little better, F7, trinity, toomey, dynoport, LRD."
if thats the case then y did u say this in another guys pro circuit VS. fmf threD??