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Here are a few major components of the fuel system for an adequate supply of petrol to the thirsty 509. The Holley HP125 (HLY-12-125) is quieter, more efficient, and delivers more fuel volume than the old Holley Blue pump. It features a 125 gph rating of free flow to feed engines up to 700 hp. The Mallory fuel pressure regulator (MAA-4309) is a three-port, return-style regulator needed for the existing return fuel line that goes back to the 15-gallon fuel cell in the Nova's trunk. Aeromotive's adjustable fuel log (AEI-14201) has telescopic logs, dual inlets with ball and socket assemblies that swivel 20-degrees in all directions to provide additional clearance for throttle stops, nitrous plates and other accessories.