[F36 435i M]

Hi guys,

Just a quick one, my 435i N55 currently has a res delete and it’s going in for a sports cat to be fitted. The garage have told me the sound increase will be quite noticeable with this new sports cat fitted. Does anyone know how much increase I should expect sound wise? I do have a stock exhaust and a res delete. I don’t want too high expectations haha.

Thanks in advance