Quote:
Originally Posted by four.8is
"the OE ones have actually stronger braid than the aftermarket ones.just cut one of the old ones open and you'll see for yourself"
After some research on different forums it seems like he is right.OE ones are not just rubber but are indeed SS braided lines wrapped in reinforced rubber.or is it just on the M3/M5's?
"People notice improvements in brake feel because they have new lines not necessarily better lines than the OE lines.change with OE and you will get the same feel"
^quote found on a different forum.
Do you guys agree?
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I don't know of any brake hoses (the flexible portion of the hydraulic lines) that do not incorporate a steel braid in their construction. I even remember my 1969 Buick Skylark blowing a front line and noticing the steel wires poking through the outer covering.
The SS exterior braid provides two primary benefits: 1) protection from exterior abrasion and 2) a less permeable hose due to the thicker cross-section of rubber encapsulated by the outside braid. An increase in braking performance or feel is an indication the new hoses have less flex or "give" in them due to a tighter and/or stiffer wire braiding than the old hoses. As the hoses age, the braiding can fatigue and the rubber become softer which contributes to a reduction in brake pedal "firmness".
The steel braiding is necessary to handle the high pressures of the hydraulic system which can exceed 2000 psi on a panic stop. Likewise, the high pressure side hoses of a hydraulic power steering system incorporate steel braiding as well.
2002 X5 3.0 263,850 miles
2004 325i 116,000 miles