Quote Originally Posted by hifial View Post
An Exhaust company can cut the dpf diesel particle filter out and program the cars ecu to ignore it ,you get better performance as well and it doesn't effect the mot emissions
This. Did it with a Modus some years back. Find a test station, a place where they only do MOT's is a good place to start for obvious reasons. Get the ECU cleared and maybe blank off the EGR if you're feeling adventurous. And before the MOT get the engine nice and warm and give it a bloody good welly up the bypass.