For the UK the MoT will test the car against rated factory settings.
You have three years prior to this, however this is usually during the warranty so anything done to the car will probably invalidate this!
I do know slightly mad people who de-cat and adjust the exhaust on almost new cars but then more money than sense springs to mind given the way I have seen them drive.
Last edited by Alistair; 04/05/20 09:47 AM.
