ok what the hell is going on this the figures. the h&r oe sport springs say 3/4" front and rear on the acura-tl site which the products come from autocarparts.com. on the optionsauto.com site the same springs say 3/4" front 1/2" rear no problems with anything when installed and they are 22 dollars cheaper. either way it doesn't seem like alot of lowering. i have 8" from my oem aero kit to the ground and 7" from the kit to the ground by the front tire. the aero kit doesn't factor in the rear because the axle back exhaust is lots lower. the h&r regular sport springs say 1.75" front and 1.75" rear on the acura-tl site which is like i said autocarparts.com. optionsauto.com says the regular sport springs are 2.2" in front and 1.75" in rear. seems to be a conflict. also i know the ride on the oe sport springs wont change anything but doesn't really seem to be worth it since it doesn't lower it that much. but the regular sport springs would be fine it it was 1.75" like the acura-tl site says but if it is 2.2" like the other site states then more suspension parts may need to be changed out. and no i dont want coilovers. i decided to lower it when i posted a link to my cars pics only to get dissed for looking like a nice suv.
if you want to see my car my website is http://www.stinkboy.net/racingimages.htm

 

Comptech springs / H&R sport springs

From their sites:

Comptech:
About 1.25" lower in front
and 1" lower in the rear.

H&R OE(stage 1):
front/rear
.75"/.50"

H&R sport(stage 2):
1.75"/1.5"

H&R Race(stage 3):
2.2"/ 1.75"

From autocarparts:

Comptech:
front/rear
1.75"/1.5"

H&R OE(stage 1):
front/rear Type S
.75"/.75" 1"/1.25"

H&R sport(stage 2):
1.75"/1.75"

H&R Race(stage 3):
2.2"/ 1.75"

Hope this helps. I would trust autocarparts more