what brand mounts did you get?
i had a problem when i did my springs years ago with moog rear strut mounts.
they lasted about a week before they started knocking really bad, theyre really crappily (is that a word??) made, and basicly ate themselfs away within a week.
replaced them with toyota parts(and yes, they were expensive 110$ea, compared to the moog ones@ 40$ or so, , and its just like stock again. no noise.

i got monroe, but the knocking was still there after i got them put on.

why would you lower your car with monroe struts, they arent performance struts and cannot handle it.

i believe he was talking about the monroe strut mount

yea, the mounts are monroe. i have bilstein struts, pretty sure those are performance lol