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KONI EVO Front Shock for Spartan and Tiffin PowerGlide with Reyco Granning IFS (Part # 99B-3234)

KONI EVO Front Shock for Spartan and Tiffin PowerGlide with Reyco Granning IFS (Part # 99B-3234)
KONI EVO Front Shock for Spartan and Tiffin PowerGlide with Reyco Granning IFS (Part # 99B-3234)
KONI EVO Front Shock for Spartan and Tiffin PowerGlide with Reyco Granning IFS (Part # 99B-3234)
KONI EVO Front Shock for Spartan and Tiffin PowerGlide with Reyco Granning IFS (Part # 99B-3234)
KONI EVO Front Shock for Spartan and Tiffin PowerGlide with Reyco Granning IFS (Part # 99B-3234)
KONI EVO Front Shock for Spartan and Tiffin PowerGlide with Reyco Granning IFS (Part # 99B-3234)
KONI EVO Front Shock for Spartan and Tiffin PowerGlide with Reyco Granning IFS (Part # 99B-3234)
KONI EVO Front Shock for Spartan and Tiffin PowerGlide with Reyco Granning IFS (Part # 99B-3234)
KONI EVO Front Shock for Spartan and Tiffin PowerGlide with Reyco Granning IFS (Part # 99B-3234)
: 99B-3234
In Stock(4)
$299.00
$368.55

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Heavy-Duty Front Shock Upgrade – KONI EVO for Spartan K2 / K3 / MountainMaster and Tiffin Allegro Bus


Upgrade the ride quality and durability of your diesel motorhome with the KONI 99B-3234 EVO Front Shock, designed for Spartan and Tiffin PowerGlide chassis equipped with Reyco Granning Independent Front Suspension (IFS). These heavy-duty shocks are engineered to deliver improved ride comfort, better suspension control, and increased durability for large Class A motorhomes.

The KONI EVO 99 Series shock absorbers feature patented open intake valve technology that allows the suspension to absorb road irregularities smoothly while still providing the control necessary to prevent excessive bounce and body movement. This makes them especially effective on independent front suspension systems with limited shock travel, where precise damping control is critical.

Compared to earlier KONI FSD shocks, the EVO 99 series uses a 50mm piston, nearly 40% larger than the 36mm piston used in previous designs. The larger piston allows the shock to handle greater forces while operating at lower internal pressure, resulting in better durability, improved suspension control, and smoother ride performance over rough roads and expansion joints.

Developed originally for high-end European motorcoaches, the EVO 99 series is now being introduced to the North American RV market to provide premium ride comfort and superior chassis control for heavy diesel pusher motorhomes.

If your motorhome experiences front-end bounce, harsh ride characteristics, or worn-out factory shocks, upgrading to the KONI 99B-3234 EVO shock is an excellent way to improve driving comfort, suspension performance, and long-distance travel stability.

Product Benefits:

  • Heavy-duty EVO shock designed for large diesel motorhome chassis
  • Large 50mm piston improves durability and suspension control
  • Patented open intake valve technology improves ride comfort
  • Ideal for independent front suspension systems with limited shock travel
  • Reduces front-end bounce and harsh ride characteristics
  • Improves steering stability and overall ride quality

Ideal For:

  • Diesel pusher Class A motorhomes
  • Motorhomes with Reyco Granning independent front suspension
  • Improving ride control on heavy front axle loads
  • Replacing worn-out factory or Bilstein shocks
  • Long-distance RV travel and rough road conditions

Applications:

  • 2004-Current Spartan MountainMaster – Reyco IFS 1460S (Does NOT fit IFS1460T)
  • 2004-Current Spartan MountainMaster – Reyco IFS 1660
  • 2004-2021 Spartan K2 – Reyco IFS 1660
  • 2017-Current Spartan K2 – Reyco IFS 1700
  • 2017-Current Spartan K2 – Reyco IFS 2000
  • 2017-Current Spartan K3 – Reyco IFS 2000
  • 2008-2010 Tiffin Allegro Bus – PowerGlide Chassis with Reyco IFS 1460S


The KONI 99B-3234 EVO front shock is designed specifically for heavy motorhome chassis equipped with Reyco Granning independent front suspension systems, delivering improved ride control and long-term durability for demanding Class A RV applications.

Specifications:

Collapsed Length Extended Length Upper Mount Lower Mount
12.24" 17.32" Eye 3/4" Eye 3/4"

Special Notes:

  • For 18K+ front axle ratings or heavily loaded motorhomes, KONI recommends the High Force EVO version for increased damping control.
  • Does NOT fit Reyco IFS1460T suspension due to clearance limitations.
  • Some Spartan IFS systems may require mounting kit APK-10000 when replacing Bilstein shocks.
  • Bilstein cross references: BE5-6199-H0, BE5-6199-H1, 24-061999.

Shock Comparison

Shock Piston Size Ride Comfort Body Control
Factory OEM Small Poor Poor
KONI FSD 36mm Good Good
KONI EVO 50mm Excellent Excellent

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Does the Koni 99B 3234 fit the front of 2020 Entegra Cornerstone ( Marc Bouchard, 11/09/2024 )
Yes, this is the correct KONI for your coach.
Can you help to ID the correct shocks for the front end of my 2004 Newmar Dutchstar. I think the are the EVO 99B-3234. I think I will need the adapter as well. ( Carey Schreiber, 06/27/2024 )
Hello, can you get the model # of the front suspension and /or existing shock part #'s ?  We are not able to VIN verify Spartan chassis applications. 
I want to put KONI 99s on a 2011 American Coach- American Eagle on a Spartan chassis,will the 99B 3234 work? Thanks ( John Lynch, 06/18/2024 )
Yes, the 99B-3234 is the correct front shock for your RV.
Just wanted to double check if the Koni Shock will fit my Spartan K3 Chassis on my Newmar Essex
I checked the lower mount & it does have a bolt.
( Joseph Tovo, 11/13/2023 )
Those would be correct for that chassis. ( 99B-3234 ) 
  • 2004-2022 Spartan K2, K3 IFS 16K to 18K w/ Tuthill (Reyco Granning) Front IFS
  • (DOES NOT fit Reyco IFS1460T IFS due to clearance issues)
Is the 99B 3234 the correct p/n for my Newmar Dutch Star with the Spartan K2 chassis? ( Chuck Jackson, 11/08/2023 )
I have VIN verified with Spartan that 99B 3234 is the correct part # for your vehicle.

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