When I was looking at getting a Ragazzon exhaust it was very hard to find a company in the uk that could supply it, I ended up buying a ultersport back box in the end which was only £130 delivered which was half the price of the raga. the Ragazzon back box should fit a standard middle pipe you can alway email them direct to check the ultersport went on with no issues just needed a different mounting rubber hanger.