I got a stainless steel back box fitted yesterday from RMS in prestwick.
The job looks good , but the noise at 2500 revs when driving is awful , to be honest i phoned them and the guy was very nice said let it settle for a couple of hundred miles , ????? noy really sure i think it will make any difference.
I have a feling the back box is too small and (cheap) any ideas ??
any ideas what to do or fit ?