Instead of the armature rotating, in a brushless motor the magnets rotate around the armature and the motor controller manages the phase shift to keep the motor rotating under load (load is related to pressure in a fuel pump).?With more torque per watt and a higher torque to weight ratio, brushless motors produce lower noise and deliver higher reliability. With a higher level of efficiency, down to fractions of a second in design speed control, the new Aeromotive brushless fuel pumps provide precise control of fuel pump RPM as pressure rises, better maintaining pump RPM and flow, producing a flatter flow curve.? Tight tolerances result in less current draw, less heat and extended life. Now there is the ability to upgrade to a premium brushless pump for faster, more reliable and uninterrupted fuel delivery with less power consumption and potential for wear or failure. ORB-10 outlet port. ORB-12 inlet with integrated pickup and 100-m pre-filter. Direct fit for all Aeromotive Stealth Fuel Cells, 6, 15 and 20-gallon. For EFI applications use regulator P/N 13134 or P/N 13110. For carbureted applications use regulator P/N 13202 or P/N 13212. Capable of 90-PSI continuous operating pressure, 150 PSI peak pressure, base plus boost. Fully submersible for custom, in-tank placement. Perfect for ?blow-through? carbureted engines up to 2,700 FWHP (race gas). Upgrade your standard brushless pump to make it True Variable Speed by buying the 18047 retrofit kit cap.