
Up to now I've been running the standard system with a cat, and the big bore DTM backbox. This is soon to be replaced with an LCB, decat pipe (which are sat here now) and whichever backbox I choose.
Firstly, how much of a noise difference is the LCB and decat likely to make (bearing in mind my current flexy section has an enormous hole in it) and secondly, how does the sound of the RC40 compare to the DTM? It sounds awesome as it is from outside, I'd like to keep that but just a little bit quieter and less intrusive on the motorway.
Thanks!