What's the name of the thing attached to the bottom of the car in the rear to keep the rear end from slamming frame? Bump stop?

 

The rubber things?

If so,yes.

 

Jounce bumper.

 

Any place where I can get a set of polyurethane ones?

 

i just want some rubber ones myself since mine are ripped off and i have sportlines. i parted out my SS and the ONLY thing i didn't take of the shell were the bumpstops

so far i haven't found them, but i haven't looked much.