Fits all Yamaha 1200 Powervalve motors. Designed to increase airflow to your carburetors and allow your engine to produce more HP. Kit fits 44mm OEM carburetors. Includes stainless capped, screen type flame arrestors built to our specifications by K&N, anodized aluminum carburetor adapters, water-repellent pre-filter covers and all necessary hardware. NOTE: Removal of catalytic converter is required prior to installation.