I finally got around to installing the Koni FSDs on my Mazdaspeed 3. While I had it apart I went ahead and installed new OEM strut mounts, strut bearings, and front bump stops. After @1000 miles on the FSDs I couldn't be more pleased- especially for the modest price($585 delivered from Tire Rack).
Keeping in mind the fact that the OEM struts/shocks were well and truly shot, the FSDs were unquestionably a tremendous improvement. They really do work as advertised, providing high damping for low frequency ride motions and low damping for high frequency ride motions. The result is a comfortable and less "busy" ride coupled with a damping rate that is appropriate for a high level of performance while cornering and braking.
I will be fitting my summer rubber in a few days(I'm currently running Cooper Zeon RS3-As) so I should get a somewhat better idea of how the FSDs perform. The only other suspension tweak I'm considering is a JBR adjustable rear anti-roll bar; I really want to dial out the remaining understeer.
Keeping in mind the fact that the OEM struts/shocks were well and truly shot, the FSDs were unquestionably a tremendous improvement. They really do work as advertised, providing high damping for low frequency ride motions and low damping for high frequency ride motions. The result is a comfortable and less "busy" ride coupled with a damping rate that is appropriate for a high level of performance while cornering and braking.
I will be fitting my summer rubber in a few days(I'm currently running Cooper Zeon RS3-As) so I should get a somewhat better idea of how the FSDs perform. The only other suspension tweak I'm considering is a JBR adjustable rear anti-roll bar; I really want to dial out the remaining understeer.