i have a set of 1 month used coilovers made by OBX racing they are the gravittaion control system that utilizes ground controls exact design meaning that it only has one perch to hold the spring with an allen bolt to tighten it and keep it in places besides from the cheap ebay coilovers where you have to turn 2 perches against eachother and they become frozen. I dont suggest you buy these unless you are looking to go extremely low. when i had these on all the way down my rear rim(rim not only tire) tucked up into the fender and the front all the way down sat right on top of the rim tucking tire. I then had the kaminari bodykit installed and i sat an inch off the ground so i had to take the coilovers off and buy springs. so i bought these for 200 and ill let them go for 100 shipped.