East Coast Speed is America's Best Speed Shop. We Sell a Complete Line of Carburetor Fuel Logs.East Coast Speedoffers these high-quality fuel logs to provide fuel to most 4150 Series Holley-style carbs with standard metering blocks. These fuel logs are available with a -8 AN male inlet fitting or a -8 barbed inlet fitting for use with a push lock hose. These logs have 1/2 in. NPT and 1/8 in. NPT plugs, which can be removed when installing a return line or fuel pressure gauge.