Koni EVO99 FSD Rear Shock Absorber - Freightliner XC

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.

Specifications

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy