The Koni FSD front shock for 2017–2025 Ford F550 and F600 RV applications is identified by the product listing as the front-position damper using Koni's Frequency Selective Damping (FSD) approach. It is presented for RV front suspension on those Ford chassis years, making it the specified front shock option when replacing or servicing dampers on supported F550/F600 RV vehicles.
Koni 17-25 Ford F550/F600 FSD RV Front Shock