The Koni 9905-1031 is a rear shock absorber from the EVO99 FSD line, built for Class A motorhome and RV chassis. It uses Frequency Selective Damping, a fully mechanical self-adjusting valve system inside a twin-tube hydraulic damper that raises damping force at low frequencies for body control during cornering and braking and softens at higher frequencies to absorb small road inputs for a smoother ride. The valving reacts automatically to input frequency with no electronic controls. Each shock is sold individually.
| Type | EVO99 FSD twin-tube hydraulic shock absorber (Frequency Selective Damping, self-adjusting) |
| Position | Rear |
| Quantity | 1 (sold individually) |
| Part Number | 9905-1031 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| — | Freightliner | XC Chassis | Class A Motorhome |
Shipping: In-stock orders placed before 4 PM EST ship the same day, with standard, expedited, and overnight options available at checkout. Backordered items ship as soon as our distributor restocks — contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
