sure this has been asked before but can't find it in search so,

my rev5 n/a has just started blowing from somewhere near the join of cat to back box, so figuring its a good time to tell the Mrs that it needs replacing



which one/s? will give a nice smooth but still deep tone please?
also, really don't want the hassle of refitting the cat for every mot so want to leave a cat in there.


Many thanks

Andy