The Straightline Performance Harley-Davidson® V-Twin Complete Nitrous Kit is a complete plug-and-play performance system that delivers an instant 40 horsepower gain while running safely on 91-octane pump gas. Featuring the patented Controlled Holtzman Nitrous Nozzle, this advanced system provides consistent horsepower regardless of bottle pressure, eliminating the need for bottle heaters, CO₂ pressure systems, or constant pressure management. Designed for clean installation on most Harley-Davidson® touring models and V-Twins, the bottle mounts discreetly inside the rear saddlebag and can be activated using the included momentary button or the factory horn button with an optional bypass switch. It's the easiest, most reliable way to unleash instant V-Twin performance.