Hey fellas, I have the full system on my '99 copper 'Busa. It looks great but be warned it is very loud. At low RPM's it has a low burble sound that is very sweet, but it wails on top! I will be getting a full dyno tune with it and a power commander in early June and will let you know how it does. I don't plan to modify the airbox other than to seal the ram air system using the pre-made inserts from Schnitz Racing and the BMC street filter. I don't think the TRE is necessary for me and I like my low end strong so don't want to carve out my flapper valve either. My bike is actually featured (last I looked) on the TBR website as I was the first to mount it with a centerstand (at least that we know of). Ryan, their chief sales guy, was very fair with pricing since it was an educational opportunity for them. I do have to say that the juncture of canister and pipe requires silicone (as per directions) because it is not a very tight fit, and it will shake itself loose and break the seal. Also, you have to be carefull with any of the TBR carbon fiber canisters melting. I have some discoloration around the flanges just from stop and go traffic. From a strict durability standpoint, you will be better off with a titanium can, but the X-Metal does look very, very cool. I'll post the tune-up results as soon as I have them. Good luck out there!