My 2005 FZ6 underseat exhaust, has a pair of Scorpion cans sticking out the rear, I bought a Givi topbox mount from evilbay, the brackets go around the cans and I had to make new ones as the original ones were too small, they would have fitted round the original cans no problems though, IMHO I would fit this kit if you are fitting a 46 litre topbox as it does not put strain on the rear grabrails, if you go the Givi route there are two differant kinds of fitting (monokey or monolock) you just need to but a differant top plate to fit one or the other, I could post pictures for you if you are interested.