Help with my “cat”

[Benhxrris]

Just wondering, I have a 2006 diesel fiesta Zetec S that I bought recently however it’s been Decatted and has an aftermarket back box, just wondering what id need to make it stock again for insurance and mot purposes, thanks in advance.

[TomsFocus]

A cat and a backbox...you've answered your own question really!

Worth noting though, the exhaust on these was fitted before the rear suspension in the factory.  So you won't be able to fit a used rear section easily.  Have you checked if the insurance would allow you the aftermarket backbox?  Might be cheaper to insure it than to buy a standard one. 

The cat is easy enough to change on its own.

 

[martyntdci]

If it has been decatted wouldn't this imply that it may have been remapped? If this is so fitting a cat would mess around with the map?

[TomsFocus]

Might have been mapped but it's just a 'dumb' cat on those, no sensors or DPF to worry about so the worst that could happen is losing 0.1 seconds on the 0-60 lol.