hi blokes , I fitted the same exhaust to my 16 plate and didn't use their spacer , just fitted straight on seemed to put stress on it trying to fit the spacer ? , my cases have loads clearance , if you want to put your old one back on you will need the spacer , so try get it of in one piece or if you're lucky it will be stuck to the one you're taking of , they're very expensive and not the same size as the older stroms , hope any of that helps,