KONI EVO Front Shock for Alpine, Monaco, Spartan & Tiffin Class A Motorhome (Part # 99B-3209)

Upgrade the ride and durability of your diesel motorhome with the KONI 99B-3209 EVO Front Shock, designed for several popular diesel pusher Class A motorhome chassis including Alpine, Monaco, Spartan, Workhorse UFO, and Tiffin platforms. This shock is the heavy-duty replacement for the previous KONI FSD 8805-1021 front shock used on many of these chassis.

After years of real-world use, it became clear that the original FSD shock was not always able to withstand the weight and demands of certain motorhome chassis. KONI engineers performed extensive testing and developed the 99 Series EVO shock, built to provide improved durability, better ride control, and increased comfort for heavy diesel motorhomes.

The 99 Series EVO design features a 50mm piston, nearly 40% larger than the piston used in the previous 8805 series shocks (36mm). The larger piston allows the shock to handle greater forces while operating at lower internal pressure, improving both performance and long-term durability.

Originally developed for high-end European motorcoaches, the KONI 99 Series is now being introduced into the North American RV market to deliver better ride comfort, improved suspension control, and greater reliability for heavy motorhome chassis.

If your diesel motorhome suffers from excessive front-end bounce, poor body control, or worn-out factory shocks, upgrading to the KONI 99B-3209 EVO shock is one of the most effective ways to improve ride quality, suspension performance, and driving stability.

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Shock Comparison