Progressive 465 RAP Shock For Harley Softail Features Represents state of the art high pressure gas monotube shock design Utilizes a large 46mm bore and deflective disc piston for precise damping The beefy 16mm hard chrome shaft rides on custom viton seals for low friction and leak free life Custom tuned for each application and is completely optimized for each bike 5 position rebound adjuster Threaded body allows for fine adjustments in sag Aluminum body and components Hard anodized finish