bump stops help

ok i read a few fourms. i want to lower my car with the 1.5 drop springs because I'm redoing my whole front suspension. i read somewhere that the "bump stops" need to be shorter? i have no idea what a bump stop is, no idea what it does and i don't know how to locate it. can someone give me some insight please. :confused:

It's the rubber cushion bolted to the lower control arm to bottom out instead of your frame or oil pan.

A lot of the lowering springs come with new bumpstops. If not you can find them protty cheap. I tink Hotchkis sells them.

i see what it is now. i guess i should have taken apart my suspension to better understand how to works. hopefully if the rain holds out, this weekend i will. thanks guys.