DISTRIBUTOR VACUUM UNIT 59d FOR ADU4049/5789 54424167

Fitted on for 59D distributors ADU4049 and ADU5789 for 998cc Mini and Metro plus MGB 1800cc-- used on Metro 1275cc also. For engines upto 1100cc use 37H8414ms and 1275cc use 37H8379MS. After lengthy tests we have found nearly all vac units are not to the originals, but with the change of added oxygenates to petrol in the 1980's and then ethanol in 2003 all previous economy and timing figure applications became history. Nearly every after market vac unit checked appear to be similar to 37H8226 without any distinguishing marks for identification. Mini Spares now have a range of distributors to work with correct simplified vac units. The new vac units are designed for our distributors they are not worse than anything else being sold on the market to match old distributors as well. Very few 850/998cc owners get their ignition and vac poundage checked out so many people are not aware of the power or economy losses. For our 998 distributors we use 37H8414MS for 45d and 59d For our 1275 distributors we use 37H8379MS for 45d/59d