KONI 9905 1038 EVO FSD Rear Shock for 2014-2025 Freightliner M2/S2RV

Vehicle Fitment

• 2014-2025 Freightliner M2 Super-C & S2RV Super-C RV Chassis (Rear Suspension)

Features

• KONI EVO FSD (Frequency Selective Damping) rear shock for heavy RV use
• Advanced open-intake valve technology for smoother damping response
• 50 mm larger piston bore for improved oil capacity and cooling
• Adaptive damping provides comfort over rough roads and firmness under load
• Heavy-duty construction for long-distance travel and high GVWR chassis
• Enhances stability, reduces rear sway and body motion while cruising
• Improves traction and handling under varying load and terrain
• Direct OEM replacement - installs on existing mounting points

Specifications

• Part Number: 9905-1038
• Series: EVO FSD (Frequency Selective Damping)
• Position: Rear shock absorber
• Shock Type: Heavy-duty twin-tube with open-intake valve and digressive valve stack
• Extended Length: ~22.80"
• Collapsed Length: ~14.48"
• Upper Mount: 3/4" eye
• Lower Mount: 3/4" eye with offset sleeve

Included Components

• 1x KONI 9905-1038 EVO FSD rear shock absorber
• Mount bushings as supplied by manufacturer
• Installation hardware if included

Product Description

The KONI 9905-1038 EVO FSD Rear Shock Absorber is engineered for the rear suspension of **2014-2025 Freightliner M2 Super-C and S2RV Super-C Class A motorhome chassis**. Featuring KONI's advanced EVO FSD technology - which combines Frequency Selective Damping with a larger 50 mm piston bore and open-intake valves - this shock delivers improved ride quality, enhanced load control, and increased stability over long hauls and uneven terrain. EVO FSD technology helps smooth out rough roads while still providing firm rebound control, reducing rear body motion and improving overall handling confidence.

Constructed for heavy-duty travel and high-GVW applications, the 9905-1038 installs directly into the OEM rear mounting points without modification. Its robust design and improved thermal performance make it an excellent upgrade or replacement for worn OEM shocks, enhancing both comfort and control for long road trips and everyday driving in large RVs. Shocks are sold individually - pairing two is ideal for balanced performance.