Hey Mick..

Have you checked with J'En for one of their mufflers? Being a UK dealer, their aftermarket
mufflers are likely to satisfy the more restrictive noise specs you have over there.

My .49 has the MVVS "tuned silencer" and it's not quiet, but...it doesn't attract the police
either so it's fine by me.

My MVVS .61 uses their full-length tuned pipe. Not bad on noise , and doesn't fall apart.

Some brands of mufflers with a "bolt-on" arrangement will fit the MVVS as well. For example,
the old ASP .61 (Generation 1) will fit the MVVS .61 as a drop in replacement. FYI.

Cheers!

'Race