If this is something you're experiencing,I'm not surprised.
The aftermarket KYBs are made to have one rate,50/50,compression/rebound,for all the models.
This means that you get the same generic rate as,say,a VW Beetle,which weighs alot less.
That's my experience with those parts,and I won't use,or suggest them to anyone with any sort of tuned suspension(trucks maybe).
The noise could also be from the coils bumping each other during their travel,at least that's what I've heard from others,and it was fixed with a piece of spiral-wrap type of wiring protector/cover,that's made from plastic.