Name: KONI 8805-1013 FSD Rear Shock for Country Coach, Spartan MountainMaster with Hendrickson Axle and TAG Axle Spartan K2 & K3 Class A Motorhome
Brand: Koni
SKU: 8805-1013
Price: 225.00 USD
Availability: InStock
Rating: 5 (1 reviews)

KONI FSD Rear Shock for Country Coach, Spartan MountainMaster with Hendrickson Axle and TAG Axle Spartan K2 & K3 Class A Motorhome (Part # 8805-1013)

KONI FSD Rear Shock for Country Coach, Spartan MountainMaster with Hendrickson Axle and TAG Axle Spartan K2 & K3 Class A Motorhome (Part # 8805-1013)

: 8805-1013

In Stock(8)

Based on 1 reviews.

$225.00

$229.50

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Heavy-Duty Rear Shock Upgrade – KONI FSD for Country Coach, Spartan K2 & K3 and Spartan MountainMaster

Upgrade the suspension performance of your motorhome with the KONI 8805-1013 Frequency Selective Damping (FSD) Rear Shock, designed for Country Coach, Spartan Mountain Master, and Spartan K2 / K3 Class A motorhome chassis. These premium KONI FSD shocks are engineered to improve ride comfort, stability, and suspension control—especially important for diesel pusher motorhomes with drive axle or tag axle applications.

KONI Frequency Selective Damping (FSD) technology automatically adapts to changing road conditions. The shock remains firm when greater control is needed—such as during cornering, lane changes, and heavy suspension movement—but softens over expansion joints and rough pavement to deliver a smoother ride.

A specialized internal valve system helps filter harsh road vibrations before they reach the chassis, reducing driver fatigue while maintaining excellent suspension stability. The result is improved ride comfort, reduced suspension bounce, and better highway control for your motorhome.

If your coach experiences harsh ride quality, rear-end bounce, or unstable highway handling, upgrading to KONI FSD shocks is one of the most effective ways to improve ride comfort, suspension performance, and driver confidence.

Product Benefits:

Frequency Selective Damping automatically adapts to road conditions
Improves ride comfort without sacrificing handling performance
Reduces vibration from expansion joints and rough pavement
Improves rear suspension stability and chassis control
Ideal for diesel pusher motorhomes with drive axle or tag axle applications
Premium KONI durability and long service life

Ideal For:

Country Coach suspension upgrades
Spartan Mountain Master chassis upgrades
Spartan K2 and K3 tag axle applications
Luxury Class A diesel pusher motorhomes
Long-distance RV travel and touring
Drivers seeking improved ride comfort and highway stability

Applications:

2000-2004 Country Coach Allure – Drive Axle
2005-2007 Country Coach Allure without Tag Axle – Drive Axle
2000-2004 Country Coach Intrigue – Drive Axle
2008 Country Coach Tribute – Drive Axle
2009 Country Coach Tribute without Tag Axle – Drive Axle
2000-2003 Country Coach Islander – Drive Axle
2004-Current Spartan K2 & K3 – Tag Axle
Spartan Mountain Master I-Beam Hendrickson – Drive Axle

The KONI 8805-1013 FSD rear shock is designed for a range of Country Coach and Spartan diesel pusher motorhome chassis. These chassis are commonly used under high-end Class A motorhomes where improved drive axle and tag axle suspension control, ride comfort, and highway stability are essential. This shock helps reduce suspension bounce, improve chassis control, and deliver a smoother ride compared to factory shock absorbers.

Specifications:

Collapsed Length	Extended Length	Upper Mount	Lower Mount
13.90"	21.81"	Eye 3/4"	Eye 3/4"

Special Notes:

Sold individually.
For Spartan Mountain Master I-Beam Hendrickson applications, a 3/4" to 5/8" bushing adapter may be required for the lower bolts.
Some Spartan and PowerGlide chassis use a 5/8" lower shock bolt instead of the standard 3/4". Check whether a 1-1/8" wrench fits snug on the head of the lower shock bolt. If the 1-1/8" wrench fits snug, you do not need the bushing set. If the 1-1/8" wrench fits loose, you do require the bushing set.
Bushing adapter may be needed if OE number is 24-191258, F4-BE5-D235-M0, or 0501-SS5-001.
Verify drive axle or tag axle position and mounting configuration before ordering.

Other Information:

Q: What is KONI Frequency Selective Damping (FSD)?
A: FSD technology automatically adjusts damping based on road frequency, providing firm control during heavy suspension inputs while softening over rough pavement and expansion joints.

Q: Why is axle position important when selecting this shock?
A: This shock fits specific drive axle and tag axle applications depending on chassis type. Always verify the correct axle position and mounting configuration before ordering.

The state of California requires that this warning be posted for people purchasing products that reside in California.

WARNING: Products may contain one or more chemicals known in the State of California to cause cancer and/or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov

Shipping Notice

In-stock items shipping via ground or flat rate are shipped within 48 hours. Expedited orders are prioritized and ship within 24 hours. Orders placed over the weekend, after Friday’s shipping cutoff, or on designated holidays will be processed on the next business day, and may not ship for up to 48 hours. For more information, please see our shipping terms.