just got a bitchin set of flows..I had thought,,, but on further examination I got to looking at the many many welds inside one single pipe..in order to complete a bend. When looking at my S&S headers they were rather smooth clear down to the collector..no disturbance in the flow of exaust what so ever..SO>>> just curious..does anyone know, for fact what really works best..ON THE DYNO????? HMMM well im gonna find out for myself but am very curious..if anyone has tried all the different brands and liked anyone of them more then the others..Was told by many that S&S were junk..but like i said they have VERY smooth tranfers in the series of bends instead of the trick lookin flows with welds all through them..this DOES disturb exaust flow..however little every little bit helps am i right??? I mean thats what we chase constantly which is why we do all these minor little tweaks like running 1200 dollars in ti to save three pounds..well any info would be fabulous on this subject and I will let you know what i come up with as far as the most hp and torque..  doing a dyno test on  the S&S,the flows,and rtz..SEE YALL playday =))