Exhaust pipe gasket alternatives – Honda CX500, GL500, CX650, GL650By JC / 1 July 2016 There are other gaskets which are compatible with those that the twisted twin uses; Napa or Fel-Pro 60567 or 12-1002 – On Amazon – On eBay Incidentally, exhaust gaskets for the GL1000 and GL1100 should also fit a CX500/CX650/GL500/GL650.