I have the Tuning Developments NA package and invidia N1 fitted. My local dealership in Peterborough wont pass an mot as they know that the primary cat is missing. They also complain that it is noisy when it goes in for service. So after service I have to take it to another testing station to get an mot. I am just down the road from Fensport but Toyota fixed price servicing is quite cheap for a 2013 gt86, so use them currently