"Best" aftermarket Vanos line?

[old///MFanatic]

I'd be interested in collecting any failure info on the aftermarket lines.
The downside I see to the flex line is that you have stress on the crimps from the tight bends, as opposed to the ridged OE line, but that's all just intuition.

These hoses are made at same line a quality S/S brake line is. A quality line design likely has passed the government “Whip Test”. Which consists of over pressuring the hose and twisting it around 800rpm for like over one and a half million revolutions. This allows user to know it’s not some cheap crimp or hose that would fail under use. Seeing how this hose doesn’t see nearly the movement a brake hose does it should be of little to no concern. Unless it’s made by some cheap company or China with no testing or oversight.