Just to make clear once & for all
https://www.gov.uk/government/public...h-implications
Please read as I regularly test & fail cars that have had Cat / dpf / EGR delete performed . owners are normally finding out the hard way at test all is not well & the same story becomes common , they bought the car WITH an MOT / test certificate and are now facing a large bill to replace & repair any issues found .
One unhappy owner has sued the vehicle seller for the cost of rectifying the car & it is presently going to the Courts to get his money & compensation