They honestly all do the same thing, lower your car obviously. It's mainly on your taste. Do you wanna be slammed or just low enough to where you can tell but not drag the ground lol. If you have enough money coilovers are always good cause you can adjust it to whatever you want. I personally have Eiback Pro-Kit and its lowered 1.5" all around and I think it's just about perfect. It's all your own preference. AM has a ton of lowering springs and pictures of how they look. Good place to look if you wanna see how they look. Gonna look awesome no matter what you get dude!im looking at lowering springs on am. whats the difference between b ford racing springs and c ford racing springs? or would yall recommend any of the other brands? idk what the difference is in any of them. all advice is appreciated.