well it finally arrived, after three months of waiting. took me about 45 min to rip the old stuff off and bolt up the new stuff, quite easy considering i didnt have any fairings or anything to remove.
before i installed it i put it on our digital scale at work and weighed it, the new system weighed 8.55lbs. then i weighed the old system when i took it off, 35.4lbs, almost 27lbs lighter! each one of those stupid looking pipes weighed over 13lbs each!
now i know im used to having quiet pipes, but does this thing ever sound loud now! my buddy with a new zx-9r says its way louder than his muzzy.
im going to try and get it into the dyno on monday to see just how much i picked up, but from what i can tell from the seat of the pants is that it fixed up that flat spot below 5000rpm somewhat, and pulls harder in the midrange and up.
here are some pics, before and after.