Allstar ALL26153 9-5/16" Center Distance -8 AN Male Inlet Carburetor Fuel Log for 4150 Model Holley Series Carburetor fuel log is designed for 4150 model holley series carburetors Features a-8an male inlet and has a 9-5/16 inch center distance Fuel log has 1/2 inch npt and 1/8 inch npt plugs which can be removed when installing a return line or fuel pressure gauge Sold each It has a 90 day limited warranty