Includes 14201 Fuel Log, 13212 A2000 Bypass Regulator and 15632 Fuel Pressure Gauge. For 4150/4500 Holley Style Float Bowls. The new Aeromotive Fuel Log incorporates features never before available. Each carburetor inlet features a ball and socket assembly that?swivels +/-20 degrees, allowing additional clearance for throttle stops, nitrous plates and other accessories; then locks in place at the?desired position. The telescoping log will fit 4150 or 4500 Dominator (P/N 14201) and Demon (P/N 14202) carburetors. The ORB-10 inlet?and outlet ports will feed the hungriest big blocks, and adapt easily to Aeromotive P/N 13212 (A2000 Bypass ? gasoline) or P/N 13214?(Double Adjustable Bypass ? alcohol) fuel pressure regulators. Carburetor inlets swivel + or ? 2 0? in all directions. Telescoping center line 7 .700? to 13.450?. ORB-10 inlet and outlet ports. (2) 1/8? NPT ports for gauges or pressure transducers. 1.056 / .806? ID bore. Type II bright dip black anodized finish.