Exhaust clamp size for Magnex back box?

  1. Established Member Joined: Apr 2009 Redcar Posts: 1971 2000 Posi Blue vtr
    #1
    As above really, any one know?

    Afaik the standard system bore is 46.6mm internal diameter. However between the backbox and my system there is a reducer to match them up so I know the magnex bore will be bigger.