We have the same car and I think you will have to replace the manifold and cat as I believe what they mean by cat back is it is only the exhaust which is the sports part and the freebie.
When did you get the car as we believe that the later part of last year the cars were coming out with the Clubsport tune as standard because of the emissions.

Last edited by Tresco; 21/06/20 10:55 AM.

Ian

2019 +4 110 Anniversary Bentley Velvet Red.