Hey, i picked up a car with Red springs and KYB GR2's... i was told they are eibach's... but they arent black so i know they arent Pro-Kit springs. Are Sportlines supposed to be red? i think they are but im not sure. i just saw BG springs are Red too... so i guess ive ether got Sportlines or BG's... any idea what the spring rates are on the STOCK coils in relation to the Sportlines and BG's?
i think a decent bump in rate, no more than 25% increase, would be a sufficient improvment to tighten up the handling.