Replaced Running Boards

[heatmizr]

Originally Posted by Jyohay

the painted sills use the same supports as the normal ones.
they are NOT reinforced.
the aluminum use a different support and are sprayed with some industrial adhesive from the factory although i think thats to keep them water tight for rusting reasons not for structural integrity
http://www.bmwmotorsports.org/pdf/e7...rd_install.pdf

So are those inner structures I see in PAX5's pics plastic? or metal?

[PAX5]

Originally Posted by heatmizr

So are those inner structures I see in PAX5's pics plastic? or metal?

Definitely not metal, but very strong EPDM plastic ... almost feels like carbon fiber reinforced. Very strong!

If/when I have a chance, I will look at the marking on the pieces.