Chadillac2000's thread shows an aluminum guibo with rubber sleeve inserts. Being an old-school BMW guy, I was not familiar with this. Thought I'd start a thread and see what feedback others have. I did a bunch of google searches and here's what I found. Don't take this as gospel ... it's information I scraped off the 'net:
- there are aftermarket guibos made with polyurethane inserts from various manufacturers, like Revshift. I don't personally care for polyurethane so I'm ignoring, but just mention it here for completeness sake.
- that said, Function7 has some kind of floating unit machined out of aluminum. One can google if interested.
- The unit Chadillac2000 shows is made by Febi, I believe. It is aluminum with rubber sleeve inserts (look similar to what one sees on the inner rear control arm mounts on an E46, for example)
Where it gets interesting, best as I can tell, from various forum posts is that this guibo was put on BMW 1M, and 335is (at some point?). Another forum post had a 135i owner that said a recall got him this upgraded part (from the original rubber guibo). Anyway searches for 1M guibos on FCPEuro shows rubber ones. ECS Tuning lists this part, but the BMW p/n goes to the common rubber part run on about 20 chassis'.
So what's the story on this? Factory part? Worth doing (it's cheap)? Downsides? Do I have anything wrong above?