Boom! Audio Stage II Fairing Lower Speaker Kit-76000353 (SKU: 76000353)Fits '14-later FLHTCU, FLHTCUL, FLHX, FLHXS, FLTRX and FLTRXS models equipped with fairing lowers. Does not fit models with Twin-Cooled engines. Requires separate purchase of Color-Matched Fairing Lower Speaker Boxes, Boom!™ Amplifier and appropriate Stage II Speaker Installation Kit. Dealer installation and software updates are required. Dealer installation and software updates are required.