what if i want to lower it on a 4.4 without air suspension...

H&R has a kit, same price.

H&R - Sport Springs - BMW e53 X5 (All) w/ Air Ride Rear Susp Only, 2000 on - Fr 1.2" Rr 1.0" - 29378-1

H&R - Sport Springs - BMW e53 X5 (All) w/o Air Ride Rear Susp, 2000 on - Fr 1.2" Rr 1.0" - 29378-2

Thanks
Brad

Ok, guys.

if you decided to get Eibach springs,
please check this site,
I'm getting mine from there as well for $160.13 shipped. :thumbup:

and whats the average labor cost?

it depends, you should call around and find it.
for me, when I had H&R springs installed, it was around $200, front springs and end links swap.
however you won't swap the end links if you get Eibach springs, so I think it would be $200+ or less.