coilovers

you really should know the weight of the rear end of the car,,or you may be playing the spring rate swap game,,,shipping springs back and forth,,,depending on who you buy them thru,they may not exchange for free ,,,i have QA1 on the rear,,,and pro shock on the front,,

any of the companies can help you with your needs,,but they will want to know the weight of the car on the rear axel,,,