Upgrade your Cummins engine with the 5317164 Fuel Drain Tube, designed to fit seamlessly with QSB and ISB models. This essential component is a direct replacement for parts numbers 4939677, 4992640, and 5317166, ensuring a precise fit and optimal performance. Crafted with meticulous attention to detail, this fuel drain tube is manufactured in China under the rigorous standards that guarantee quality and durability. Keep your engine running smoothly with this reliable and durable replacement part.