Obtained from closed motorcycle shop that primarily serviced Yamaha is this massive used muffler, tailpipe, silencer. The only bikes that I know that cone out to a large diameter exit (5 1/2") might be the VMAX or Pazer. The only markings on the exhaust are D4-1004C (on the bracket) and that does not cross reference to anything in google search. It appears lightly used and in very good condition with no eye detracting blemishes. May be aftermarket as the baffle is deep inside the muffler so this may produce some noise. Any help on bike model is appreciated so that I can more accurately describe this muffler.