- The bolt that comes with the metal line: factory is M10 x 1.0.
Make sure you get the bubble flare type with M10 x 1.0 bolts.
Do NOT buy the bubble flare line with "Standard SAE bolts".

- Note that for two (2) REAR brake lines, BMW used different unions
M12 vs M10 to prevent confusion in the factory assembly line. But
both pipes are the same with O.D. = 4.75 mm.


Anyone got a link for these? I'm a bit confused what exactly is needed and what's the length of these bolts?