four.8is
Here is the set of factory brakes lines that came off my 2005 4.8. The fronts are on the left. Rears have a flexible section then metal pipe then flexible again. The middle solid pipe goes in the line carrier on the rear suspension arm.
On the ESC rears are all "ss flexible"/ no mid pipe. I had to adjust the line carrier a bit on the rears to hold the ecs line. No big deal but figured I would mention.
Interesting what you are finding on the BMW lines. Are they saying the old ones were SS inside too or only the new ones ?
I too have read a bunch of posts about SS lines not lasting. The ESC set is rubber coated but the SS is exposed near the connectors which has me wondering about corrosion etc.