The K-Tech Razor IV Rear Piggyback Shocks offer multiple adjustment, improved control, refinement and awesome looks make K-Tech Razor shocks a leap beyond standard equipment. The Razor range of shock absorbers are available in two styles, giving up to 4 way adjustability and multiple length options allowing you to customize your motorcycle for looks and riding style. The Razor IV twin shock configuration from K-Tech Suspension offers incredible performance, easy adjustability, and clean looks. Designed to fit all twin shock Harley Davidson applications, the Razor IV includes a piggyback reservoir and is nitrogen gas charged. The Razor will provide an immediate improvement in ride comfort, handling, and style for your twin shock Harley!