just got my new supercharger installed, the bearings in the old one were starting to go and i didnt wanna push it, how many miles do superchargers last before that need to be replaced?

I had 100k on mine when I took it off for a ported SC. It sat on the shelf and was installed on a Grand Prix because that one had bad bearings. Basically, if it'* not making noise, leave it alone. If the bearings start going out, then do a rebuild.

yea im thinking about selling it to a rebuild shop bc right now its sitting in my trunk eating up gas milage lol, and this will be my thirs super, the first 1 had 100k and the second had 70k so i guess they both had a good run