The BMW S1000XR’s engine compartment is tight enough that the standard single-unit Denali horn will not fit, requiring the two-piece Split Dual-tone version instead. This guide walks through the complete parts list and the installation process, covering fairing removal, bracket mounting, air-hose routing, and wiring. I also address the challenge of routing the air hose away from engine heat. Continue reading How To: BMW S1000XR Horn Upgrade