After some dicking about with the exhaust on the bumblebus, I've had to use the angle grinder to seperate some rusty bits. The clamp that holds the silencer to the cat is stupid expensive [1]to replace, however it's all in good condition except for the nut/bolt/spacer thing, similar to: [URL]http://www.motorworks.co.uk/bmw/prodimages/sm/EXA41478.jpg[/URL] On all the ones I've seen, the bolt head is shaped to match the clamp, and is an interference fit into the spacer in the middle. I'm not sure that taking one apart would be successful. Does anyone know if the nut/bolt/spacer things are available without the clamps, preferably in stainless, so I can rebuild my original clamp? [1]£70++ with integral heat sheild/trim bollocks