Originally Posted by Z K
Swift uses different materials for their springs that make it lighter and have less coils so you will have less issues like coil binding and rubbing. Also, most Swift springs are designed with performance in mind. They usually don't lower the car very much and give the maximum amount of suspension travel while increasing performance and maintaining maximum shock life on a lowered car. Eibachs tend to be "too soft", H&R are "too stiff and too low"... Swift strikes a good balance. So you probably don't want Swifts to slam your car for looks but if you are looking for a slightly lowered stance with a performance increase, these are the ticket.
Of course every application is different. Let's see how these perform.
I wonder if these will be linear. I'm pretty sure Eibach and H&R are progressive.