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Progressive Suspension 412 Series Shock for Harley FLH - 13.5 Inch Heavy Duty Black Model 412-4078B
Regular price $379.95 USD
Category:
Enhance your Harley FLH's ride quality with the Progressive Suspension 412 Series Shock, designed specifically for Harley models to deliver improved suspension performance and durability. This shock features a simple yet robust design that offers a cost-effective upgrade to your motorcycle's existing suspension system. The 13.5-inch length provides a balanced ride height that can contribute to better handling and stability on the road. Made in the USA, this shock is built to meet high standards of quality and performance.
The 412 Series Shock includes a five-position cam-style spring preload adjuster that allows you to easily dial in your desired ride feel. This feature ensures versatility for various riding conditions and rider preferences. The shocks are equipped with black covers and springs, giving your bike a sleek, aggressive look while maintaining durability. Some or all shocks listed are approved for road use; please refer to the most recent certification for compliance details.
When installing the 412 Series Shock on '86-'15 XL models, it might be necessary to modify or space the chain or belt guard to ensure proper clearance. Slight variations in shock length—either longer or shorter than stock—can impact the motorcycle's head angle, offering either quicker or slower steering responses. Heavy Duty applications are recommended if your bike routinely operates near its maximum load capacity, often over 50% of the time. Always verify that your wheel travel can accommodate shocks of different lengths without clearance issues, such as contact between the swingarm, axle, exhaust, or tire, to ensure safe and optimal performance.
Designed for durability and ease of adjustment, the Progressive Suspension 412 Series Shock is an excellent upgrade for riders seeking reliable performance and precise handling on their Harley FLH.
Features:
- Designed specifically for Harley FLH models for optimal fit and performance
- 13.5-inch length provides balanced ride height and handling
- Five-position cam-style spring preload adjuster for easy ride customization
- Heavy Duty applications recommended for bikes operated near maximum load
- Made in the USA with durable black covers and springs
- Adjustable length may alter steering response for personalized riding experience
- Compatibility with '86-'15 XL models may require chain/belt guard modifications
- Suitable for road use, with certification available for compliance





