I.ve removed my charcoal canister, you need plug the one hose that goes to the fuel injection and the other is the vent for the gas tank I just cut them shorter and tucked them neatly under the seat. Yes the cat is in the stock exhaust and yes that thing is heavy, I just swapped mine out for the FMF Apex at least 15-20 pounds savings and looks great. Pics in the gallery. I'll be going to the drags this Friday and my buddy has a GSXR 1000 I'll let you know how I make out, and as far as a road course is concerned the SD will definatly hold its own. Don't underestimate your SD, Check out these lap times and speeds
http://www.superduke.net/forum/album_pic.php?pic_id=279