Progressive Suspension PS-444-4063B 444 Series 11.5" Standard Spring Rate Rear Shock Absorbers Black for Sportster 04-21 2L nylon 400D GORE-TEX fabric

2L nylon 400D GORE-TEX fabric

creating the most efficient mating of the exhaust gases

(2) Rocker box gaskets

• RCM Gaskets with Bead

Progressive Suspension PS-444-4063B 444 Series 11.5" Standard Spring Rate Rear Shock Absorbers Black for Sportster 04-21 2L nylon 400D GORE-TEX fabricOur 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 of the cap. 444 Series