i bought a 2006 zx6r back in march and i'm in love with it, i want to get an exhaust but i'm not financially able to drop 480 bucks on a slip-on exhaust. my buddy has a 2006 r-6 and his exhaust that he has on it has no packing or anything it just come out of the headers and a bit past the rear sets and is just wide open. so my question is can i just take my exhaust off and bend some pipe, slap it on the mid-pipe and call it even. i thought if i did that it might be too loud but my buddies bike is not unreasonably loud. will i lose any power if i do that (back pressure and what-not) and what about the o-2 sensors? and my last question is if i were to do that would i risk melting stuff under my seat, and if so would an exhaust wrap help any? thanks.