These are high quality condensers supplied to us us to the correct original specifications, with no shortcuts or skimping in manufacturing processes, which is what causes the reliability issues many users have suffered from. Lucas originally made three separate part numbers to cover these applications, but we now use one common condenser with bracket variations to achieve the same result.
The capacitance of 0.23 mpf is the same in all applications.
407044 fits DX/DY/DZ & DVX variants & has the bracket in the centre.
400308 fits DK4A/DK6A with the bracket at the end.