Originally Posted by David@ApexRaceParts
If you remove the helper spring on the KW clubsports, it should fit without any issues, since the helper spring causes the spring perch to sit lower than needed. Coilovers that utilize a 6" linear spring in the front should not lose any inner clearance as the spring perch should still be above the wheel and tire.
6" free length may not be under tension with the suspension at droop so you must be careful. The other thing to consider is coil bind with a 6" spring with limited stroke, unless high rates are used.