Do i need to register my mods if they are stock from other cars of the same make?

I just asked this same question for alloys and the answer seems to be that there's no need to register for alloys on a ford fiesta even if they are not stock to that car, so it got me thinking, is it therefore the same for all mods? E.g. If i got an exhaust from an other ford or ford racing seats, will i have to register them?

A reasonably clever lad would call his insurance company and ask.

Yes of course. It doesn't matter if they were standard on another car, If they didn't come standard on your car it is a modification (of your car). My advice? To be certain, ask your insurance company… Why wouldn't you?

modifications, not 'mods'.

Grammar matters