This is a modified competitive fuel tank cap suitable for QJ Motor Racing Series models, including Racing 600, Racing 550, Racing 400, Racing 350, Racing 250, and SRK Chase 600/350. It offers a variety of color options: black, black – red, titanium red, titanium black, silver – black, and silver – red, meeting personalized needs. With a quick – release design, it enables fast operation, enhancing the riding experience and the competitive style of the vehicle. Over 200 people have added it to their purchases, and more than 300 units have been sold.It fea-tures excellent cost – effectiveness, providing exclusive modification parts for QJ Motor Racing Se-ries owners.