The Arai Diffuser-12 Nishikigoi Black refers to the specific replacement aerodynamic ventilation air-duct system (Type-12 Diffuser) designed with the limited-edition Nishikigoi (Koi Fish) Black graphic theme.

• Type-12 Engineering: Built 20mm longer and straightened relative to older designs to work flush with the rear AirWing for maximum high-speed stability.
• Ventilation Efficiency: Features large air intake scoops that increase airflow intake by 19% compared to legacy Type-10 variants.
• Adjustable Vent Sliders: Built-in 3-position toggle switches (fully open, half open, completely closed) designed with large tabs for effortless manipulation while wearing heavy riding gloves.
• Impact Breakaway Logic: Adheres to Arai’s rigid “R75 Shape” philosophy, meaning the diffuser is intentionally designed to shatter or break away instantly under crash impacts so it doesn’t snag on pavement.
• Graphic Pattern: Embellished with the detailed, traditional Japanese red, white, and black Nishikigoi (Koi Fish) print flowing seamlessly across the gloss black base.