The GM Genuine Parts 12639108 Secondary Air Injection Check Valve is a high-quality replacement part made by GM in Japan. Designed specifically for GM vehicles, this valve helps to ensure proper air flow and filtration in the secondary air injection system. With the manufacturer part number 12639108, this check valve is a reliable and durable option for maintaining the performance of your vehicle's air injection system- CHECK VEHICLE COMPATIBILITY BEFORE PURCHASE, RETURNS NOT ACCEPTED. New item, not in original ACDelco box.