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Message: <blockquote data-quote="ReplicaR" data-source="post: 1414436" data-attributes="member: 9209">The rebuild to stock or custom is totally your call. Stock Koni valving is pretty good, and can handle a lot of spring rate before you start going outside of what it can handle. According to MM, Koni SA front strut can handle up to 375 lbs of coilover spring rate, and rear is about 250 lbs of coilover rate. I'm running 450/300 currently, and it's a pretty good for a track car with no aero. Once I will get some aero devices, I will increase the rate another 75 lbs, hopefully that will be within the range. ProPartsUSA is pretty close to me, I'm dropping the shocks off there on Wednesday morning.</blockquote>