I'm will be installing my coilvoers soon and do I need to get them tuned? What's a good setting for the HKS RS with F-med R-med stillen sways?

 

If it was my car I'd set the rears half way up from full soft and the fronts 5/8 to 3/4's up from full soft and drive on them for at least a week. Every coilover system is different, out of 32 settings I was happiest at 27/29 off of full soft (meaning almost full stiff).