KONI 99B 3209 EVO99 Front Shock for Alpine/Peak Motorcoach RV Chassis For Sale - New and Used

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Part Brand: KONI

Part Number: 99B 3209

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.

*Parts are for USA spec vehicles, please contact us to verify fitment on JDM & international models.

· · · SHIPPING · · ·

• Free shipping across the contiguous 48 United States (excludes Hawaii and Alaska). Item(s) ships on the same day or within 1 business day. Delivery time is within 2 to 4 business days excluding next day deliveries. Orders over $750 require signature for delivery.
• Canada customers - If does not collect import & duty fees during checkout, the shipping carrier will collect them prior to delivery.

· · · RETURNS · · ·

• Your complete shopping satisfaction is our #1 priority. If an item you ordered from us does not meet your expectations, please contact us within 30 days of receiving the item(s). If your order arrives damaged from shipping please contact us and we will provide a prepaid return label to send back for a replacement or refund.

• Returned items must be in the original packaging (including plastic wrapped items) and in brand new condition.
• Any returns received installed, mounted, used or missing components will be subject to return fee's.

· · · PAYMENTS · · ·

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• PayPal, and all major credit cards/debit cards are accepted.

· · · response · · ·

• Customer satisfaction is a top priority for us. If you have any issues with your order, please let us know. We will make every effort to resolve any problems and ensure you are satisfied.

· · · CONTACT US · · ·

• We appreciate your business. If you have any questions, please message us through and we will respond within 24 hours on weekdays. Feel free to browse our store for other available items. Thank you again for choosing to shop with us!

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