Yeeeaaaaa... I am inclined to agree with Solman JUST a freeflow can is only going to give you about 5-6 HP, then you have to concider the Baffles in the midpipe (another 4-5 HP) Jetting and opening up your air intake will add more. I have Dyno'd on 3 separate occations with my new settings (Yosh bolt on, K&N, stock Pilots, larger mains, 1 needle shim, snorkel removed, and with some bitching and groaning and fine tuning the A/F screws) I pulled 117 avg with that set up. 5 Degree advancer smoothed it out, but unless you get into the GSXR Cams, piston upgrade, and stage 2 Jet kit, that is about all you are going to get out of it. There are some guys on here that have seen more than that, but they also have Holeshot or Ivan's Jet kits I have the poor mans kit. But hey if you believe everything you see advertised I would have married, boned, and procreated with Angelina Jolee by now...