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As others have recommended, your A'PEXi EXV N1 coilovers are likely exhibiting spring bind or bearing issues.
6" long 6k springs will have the potential for binding up, especially if they're not a branded spring (Eibach, Swift, Hyperco, etc). When the car is on the ground, turn the steering wheel sideways and look at the springs. If the spring's coils are nearly touching, it's likely to be a binding issue. Lower the preload or swap to stiffer/longer/branded springs.
Regarding the bearing, that's easy to address with the coilovers off the car. Check for rust/damage at the pillow ball and thrust bearing (which is the black plastic ring at the lower perch). When you have 0 mm preload, things should spin smoothly without any slop or grinding.
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Last edited by Shankenstein; 10-12-2016 at 02:10 PM.
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