I've read in previous posts and in this one that there is a sleeve that can be installed on the UDP. What is this sleeve for, is it there because of a wear issue?

Is the sleeve now standard on the UDP that is shipped from ASP? Or do you have to tell them to install the sleeve?

I have a Fidanza flywheel that I'm waiting to install and would also like to get a UDP pulley to install.

 

yeah i was curious about that as well. I think i read that the new ones from asp are good to go, but i could be wrong.