Name: KONI 8805-1005SP1 FSD Rear Shock for Beaver Coach Magnum Chassis Class A Motorhome
Brand: Koni
SKU: 8805-1005SP1
Price: 265.00 USD
Availability: InStock

KONI FSD Rear Shock for Beaver Coach Magnum Chassis Class A Motorhome (Part # 8805-1005SP1)

: 8805-1005SP1

In Stock(10)

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$265.00

$304.75

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Heavy-Duty Rear Shock Upgrade – KONI FSD for Beaver Coach Magnum Chassis

Upgrade the rear suspension performance of your motorhome with the KONI 8805-1005SP1 Frequency Selective Damping (FSD) Rear Shock, designed for Beaver Coach Magnum chassis Class A motorhomes. These premium KONI FSD shocks are engineered to improve ride comfort, stability, and suspension control—especially important for diesel pusher motorhomes equipped with Beaver Magnum 4, 8, or 10 air bag suspension systems.

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 rear 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 air ride suspension
Premium KONI durability and long service life

Ideal For:

Beaver Coach diesel pusher motorhomes
Magnum air ride suspension chassis
Drive axle and tag axle suspension upgrades
Long-distance RV travel and touring
Motorhomes seeking improved ride comfort and highway stability
Heavy coaches carrying large loads

Applications:

Beaver Magnum Air 10 Bag Chassis – Drive and Tag Axle
Beaver Magnum Air 8 Bag Chassis – Rear
Beaver Magnum Air 4 Bag Chassis – Rear

The KONI 8805-1005SP1 FSD rear shock is designed for Beaver Coach motorhomes built on the Magnum air ride chassis. These chassis are widely used in diesel pusher motorhomes where improved rear suspension control, ride comfort, and highway stability are essential. This shock helps reduce rear suspension bounce, improve chassis control, and deliver a smoother ride compared to factory shock absorbers.

Specifications:

Collapsed Length	Extended Length	Upper Mount	Lower Mount
15.12"	24.09"	Eye 3/4"	Eye 3/4"

Special Notes:

Sold individually.
Many Magnum air bag chassis use one shock per air bag, so you may need four or six shocks to complete the rear suspension.
Some Beaver coaches use the non-SP1 version (KONI 8805-1005). Verify mounting hardware before ordering.
If the bottom bolt head is 1-1/8", this SP1 version is correct.
If the bottom bolt head is 3/4", you need KONI 8805-1005.
Bilstein cross reference numbers: B46-2093-M1 and AK1275.
These shocks use a 3/4" eye top and bottom mount.

Other Information:

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

Q: Why do some Beaver Magnum chassis require four or six rear shocks?
A: Many Magnum air ride suspension systems use one shock absorber per air bag, which can require multiple shocks on the rear suspension depending on chassis configuration.

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.

KONI FSD Rear Shock for Beaver Coach Magnum Chassis Class A Motorhome (Part # 8805-1005SP1)