PROGRESSIVE SUSPENSIONPart Number : PR-31-4004 PR-31-4004 Progressive Suspension Standard Height FST Fork Monotube Cartridge Kit For 2014-2016 Touring FLHR/C, FLHTC/U, FLHTK, FLHX/S, FLTRU/SE & FLTRX/S ModelsAsymmetrical monotube damper kit with FST dampers. Spring rate and damping is pre-set. No modification to forks required.This true high performance Progressive Suspension asymmetrical monotube fork kit that features a set of gas charged road smoothing Frequency Sensing Technology (FST) dampers and custom tuned progressive rate fork springs.Offers better road holding, better resistance to front brake dive, less susceptibility to bottoming out and improved stability in cornering.Comes as a complete replacement kit including all internal fork components, apart from the fork tubes and oil. FITMENT INFORMATIONRoad King - FLHR: 2014-2017Road King Classic - FLHRC: 2014-2017Road King CVO/SE - FLHRSE6: 2014Electra Glide Ultra Classic - FLHTCU: 2014-2016Electra Glide Ultra Classic Low - FLHTCUL: 2015-2016Electra Glide Ultra Limited - FLHTK: 2014-2016Electra Glide Ultra Limited Low - FLHTKL: 2015-2016Street Glide - FLHX: 2014-2016Street Glide Special - FLHXS: 2014-2016Road Glide Ultra - FLTRU: 2016Road Glide Ultra CVO/SE - FLTRUSE2: 2016Road Glide Custom - FLTRX: 2015-2016Road Glide Special - FLTRXS: 2015-2016.