Canton - 15 Fuel Filter - Recirculating 1/4" NPT "Y" Block FilterThis recirculating "Y" block filter allows you to easily switch from a blocking or non return style fuel system to a return style or bypass style fuel system, as is common when swapping from a carbureted fuel system to an EFI fuel system. Using the recirculating filter eliminates the need to fabricated a return line into your fuel tank. Fuel Filter Features * Lightweight billet aluminum * Straight through design provides excellent flow * 2 3 4"