has anyone on the board tried installing the 540 brake ducts ? i just finished putting them on my 89' 525i and they are definitely a B#@CH . i used the section on this site for the install. bought the ducts and brackets from the dealer and went to work as per the site directions. if anyone tries this , just be warned that i had to also cut the new ducts and brackets or i would not be able to re-install the factory fog light bracket. my car is a grey market car , so i don't know if that made a difference (which i don't think it should). never the less , it looks good, so i guess it's worth it, but you could not pay me to do it again.just a little f.y.i. oh yeah use the first cut, as described by the author as it leaves the notches for the spring loaded plate. the second cut pictured will leave a gap between the ducts and the plate. . just trying to give some heads up for anyone trying to make this upgrade.