Fitted this I.L.Motorsport twin centre exhaust back box and diffuser last summer. Fitting was quite easy and did not require any modifications to the rear bummer apart from 4x self tapping screws underneath the diffuser. The upper part of the diffuser is held in place with 3m tape. The exhaust has a nice sporty raspy note but is a little load when starting up from cold. In the pic you can also see the wheels pushed out slightly with 20mm spacers. I have since this pic was taken fitted lowering springs which I will upload in another post.