TEIN Type FLEX damper kit was designed to provide driving comfort and sports performance with its full-length adjustment system. We have incorporated separate height and preload adjustments, which allows you to have various set-ups to meet different road conditions. The FLEX Damper kit includes pillow ball upper mounts and is compatible with the EDFC, for maximum performance for the streets. * EDFC offered where application is available More on EDFC EDFC (Electronic Damping Force Controller) makes it possible for the driver to control the damping force by controlling a motor installed in the shock absorber while being seated in the drivers seat.