KONI 99B 3209 EVO99 Front Shock for Alpine/Peak Motorcoach RV Chassis

Vehicle Fitment

• 1991-1995 Spartan MC2000 (Front Suspension)
• 1996-2004 Spartan MountainMaster I-Beam (Front Suspension)
• 1998-2006 Alpine Coach Peak (Front Suspension)
• 2002-2011 Roadmaster RR4R/R4R (Front Suspension)
• 2005-2009 Workhorse UFO (Front Suspension)
• Tiffin Phaeton PowerGlide I-Beam (Various Years Front Suspension)
• 2018-2025 Freightliner S2RV/M2 (Front Suspension with spacers)*

Features

• KONI EVO99 heavy-duty front shock tuned for Class A motorcoach/RV applications
• 50 mm large piston bore for increased oil capacity and thermal stability
• Patented open-intake valve for improved ride smoothness and reduced harshness
• Digressive valving for better control over bumps and highway travel
• Twin-tube hydraulic design engineered for heavy GVWR motorhomes
• Enhances front-end stability, control, and comfort on long trips
• Direct front replacement for supported chassis models
• Sold individually - replace in pairs for balanced performance

Specifications

• Part Number: 99B-3209
• Series: EVO99
• Position: Front shock absorber
• Extended Length: ~23.59" (center-to-center)
• Collapsed Length: ~14.92" (center-to-center)
• Upper/Lower Mount: 3/4" eyelet
• Piston Bore: 50 mm
• Designed for stock and independent front suspensions on listed RV chassis

Included Components

• 1x KONI 99B-3209 EVO99 front shock absorber
• Mount bushings as supplied by manufacturer

Product Description

The KONI 99B-3209 EVO99 Front Shock Absorber is a heavy-duty suspension upgrade designed for a range of Class A motorhome and RV chassis spanning multiple decades of production. It is engineered with a large 50 mm piston and patented open-intake valves to deliver smoother damping, improved control over harsh surfaces, and enhanced comfort on long drives - ideal for heavyweight RVs and luxury motorcoaches.

Applications for 99B-3209 include 1991-1995 Spartan MC2000, 1996-2004 Spartan MountainMaster I-Beam, 1998-2006 Alpine Coach Peak, 2002-2011 Roadmaster RR4R/R4R, Workhorse UFO (2005-2009), and Tiffin Phaeton PowerGlide I-Beam models. Additionally, with the correct spacers, it can be used in Freightliner S2RV and M2 front suspension setups from 2018 through current model years. Sold individually, it's recommended to install two for balanced performance.