; Allows EFI conversion without welding a return line fitting to the fuel tank; Simply cut a 2-3/4 section out of any 2 O.D. fuel tank filler tube and insert the 6061-T6 aluminum adapter installs on most vehicles without removing the fuel tank; Includes two Buna-N sleeves and four stainless steel hose clamps to seal the connection on each end of the adapter; 3/8 aluminum fuel fitting is factory welded to the adapter for a leak free seal; Fuel fitting has a 90° smooth-contour bend inside the adapter to direct return fuel downward into the tank; Use with Moroso Aluminum Fuel Line No. 65330 for a return line from the EFI regulator to the fitting located on the filler tube*Not legal for sale or use on pollution-controlled vehicles.