ok i have done a test on both pipes the ORIGINAL power pros not ct f7 the original power pros vs the lrd rfx exhaust with fmf silencer. for jetting the powerpros seemed to be jetted spot on with my 145 main and 45 pilot leanest needle setting but the lrd was running just a tad to rich.but the lrd had a AMAZING BOTTEM END and but the power pros EXTREMLY LACKED bottem end but had a pretty nice top. the lrd had all around power while the power pros only wanted top end power. which i did not want and if it is over geared it will stall on the spot. the power pros had absolutely no bottem end. but had some good top overall power wise with the quitest and most power gain you cannot beat the lrd so power pros vs lrd=lrd FTW
