OK, so the problems go on.
Matsu was kind enough to give me his standard downpipe and cat, so took them to the garage to get fitted and retested,
Well, due to having a pipeworx exhaust with a 3inch pipe and the dtandard cat being only 2.5 then it would not fit, and they said that they wouldn't like to cut the pipes to make them fit, when I sold it, then it would make it harder to put back to standard, or if I changed my mind again then it would be difficult to rectify.
They have told me I need a 3" sports cat to get it all tied in.
Anyone any ideas on a good place to get one, and how much I can expect to pay please, and also how much I can sell my decat one that is on at the moment?
Thanks for everyones patience.