the 2 pipes shouldnt even be compared fmfs are junk an sound like junk you should be debating between t-5s an pro circuits both great pipes i ran t-5s an loved them had to let them go for cpis when i bought my serval if i had a stock cylinder banshee i would go with t-5s all day but a couple of my buddys run pro circuits and like them both sound sweet just dont get fmfs wat evr you do