Zero dark

http://www.fortune-auto.com/500series.htm

http://www.fortune-auto.com/510series.htm



i dont track or autox

looking for a quality coilover to switch over to from my standard BC-BR coilovers.

main concern is ride comfort with performance and feel a close second

i dont mind paying for quality when it makes sense, would any GURU's chime in on the differences between these 2? Spring rate recommendations?

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MD Art Pipes, MD Shockwave exhaust, AAM Intakes, Stillen Crank Pulley, Z1 25 Row Setrab, Whiteline Diff Bushings, 20mm H&R spacers, BC-BR Coils, GT-R push button, 3M, Tommy Kaira Knob, Takata Drift III, Custom Harness Bar, Zwork Headlights, EVO-R, Uprev