Progressive Suspension 444 Series Shocks Heavy Duty 12.5/13" Dyna 91-17 3OM Meets the criteria for performance

Meets the criteria for performance category API GL 5

9 US gallons

89-92 VT SHADOW ACE 1100cc

long-lasting performance for your Harley

Progressive Suspension 444 Series Shocks Heavy Duty 12.5/13" Dyna 91-17 3OM Meets the criteria for performanceOur Progressive Suspension 444 Series Shocks feature a proprietary patented Frequency Sensing Technology (FST) that has the unique ability to dynamically adjust damping as you ride, what this means is whether youre hitting the small or big bumps in the road, the shock distributes oil through ports accordingly to soak up the hit making for an ultimately comfortable ride. A top mount threaded preload adjuster allows for fine tuning with a simple twist