Offered up here is an original new old stock Ducati 52mm manifold spacer gasket, correct for 1979 900SS twins.  This came from the parts bin of a dealer who carried Ducati throughout the 1960s, 1970s and 1980s.    Perfect new old stock condition, just out of original packaging to be photographed.  

Please feel free to get in touch with any questions. This item ships worldwide.

Please be sure to check my other items for more hard to find European motorcycle parts.