This fuel return line/pipe hose is a must-have for BMW 1 F20 and F21 owners who prioritize performance. Designed for auto performance parts, this hose is perfect for racing and enhancing the overall fuel system of your vehicle. It is compatible with BMW models that have manufacturer part numbers 13537810786 and 13538507680. With this fuel return line/pipe hose, you can rest assured that your BMW's fuel system is in good hands. Its high-quality construction ensures long-lasting durability and efficient fuel flow without compromising performance. Don't miss out on the opportunity to upgrade your BMW's performance with this top-of-the-line fuel return line/pipe hose.