- Stock Status: In Stock
- Manufacturer: Koni
- Model: 9905-1029
- Weight: 10.00lb
- SKU: 9905-1029
- UPC: 9905-1029
- Location: 7GT-2
Koni Special - Limited Time Only
Available Options
Heavy-Duty Rear Shock Upgrade – KONI EVO for 1998-Current Ford F53
Upgrade the ride quality and stability of your motorhome with the KONI 9905-1029 EVO FSD Rear Shock, designed for 1998-Current Ford F53 Class A motorhome chassis. Built with KONI’s latest EVO Frequency Selective Damping (EVO FSD) technology, these shocks deliver exceptional ride comfort while maintaining the suspension control needed for large gas Class A motorhomes.
The EVO FSD design combines KONI’s patented Frequency Selective Damping technology with advanced open intake valve design, allowing the shock to automatically adapt to road conditions. The shock remains firm during cornering, braking, and large suspension movements while softening over expansion joints and rough pavement for a smoother ride.
The EVO series features a large 50mm piston, nearly 40% larger than standard FSD shocks. The larger piston reduces internal pressure, improves cooling, and increases durability under heavy loads. Combined with KONI’s digressive valve stack and modular piston design, these shocks effectively control rear suspension movement while maintaining a comfortable ride.
If your Ford F53 motorhome experiences rear-end bounce, poor body control, or harsh ride quality, upgrading to KONI EVO shocks is one of the most effective ways to improve ride stability, suspension performance, and overall driving confidence.
Product Benefits:
- Latest EVO FSD technology improves ride comfort and suspension control
- Large 50mm piston improves cooling, durability, and responsiveness
- Reduces motorhome bounce and harsh ride characteristics
- Improves rear suspension stability and body control
- Ideal upgrade for Ford F53 Class A motorhome chassis
- Premium KONI engineering for long service life
Ideal For:
- Ford F53 Class A motorhomes
- Motorhomes with heavier GVWR or longer wheelbases
- Improving rear suspension stability and ride comfort
- Reducing bounce and harsh ride over rough roads
- Long-distance RV travel and cross-country trips
Applications:
- 1998-Current Ford F53 Chassis – Rear
The KONI 9905-1029 EVO rear shock is designed specifically for the Ford F53 Class A motorhome chassis. These shocks provide improved suspension damping to reduce rear suspension bounce and maintain better stability under heavy loads.
KONI EVO shocks provide a significant upgrade over factory shocks by delivering better ride comfort, improved suspension control, and enhanced stability on highways, bridges, and uneven road surfaces.
Specifications:
| Collapsed Length | Extended Length | Upper Mount | Lower Mount |
| 15.67" | 25.28" | Eye 3/4" | Eye 3/4" |
Special Notes:
- Sold individually.
- Two shocks required per rear axle.
- Designed specifically for Ford F53 motorhome chassis.
Other Information:
Q: What is KONI EVO FSD technology?
A: EVO FSD combines KONI’s Frequency Selective Damping with an open intake valve design and a larger 50mm piston to deliver improved ride comfort, better suspension control, and greater durability compared to standard FSD shocks.
Q: Are KONI EVO shocks better than factory Ford F53 shocks?
A: Yes. KONI EVO shocks significantly improve ride quality, reduce motorhome bounce, and provide better body control compared to most factory shock absorbers used on Ford F53 motorhome chassis.
Shock Comparison
| Shock | Piston Size | Ride Comfort | Body Control |
|---|---|---|---|
| Factory OEM | Small | Poor | Poor |
| KONI FSD | 36mm | Good | Good |
| KONI EVO | 50mm | Excellent | Excellent |
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
