I was wondering if they lower the car at all? I have a 97gt stick and 273 gears curently soon to be replaced with 373s (i have them already just waiting for the install. I was wondering how much of an improvement id see in the et with the springs? Would shocks or struts be a better idea? MY goal is 13.9 without power adder and without touching the heads. So i turn to the suspention.My curent mods are SLP catback, mac cai, march pulleys, wide mouth pleneum. My best run is 14.9 at 93 mph with a 2.385 60ft so i need to improve my launch.No drag slicks or radials. That time is without pullys so i might be able to get 14.8 if i get a good launch.