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The Aeromotive AERO-13139 New Medium to High Horsepower A1000 Gen-II EFI Regulator features and benefits associated with Aeromotive regulators but now comes in a new smaller package. Designed for medium to high horsepower applications the 13139 regulator can handle high-flow EFI fuel pumps and the most aggressive street machines. This is the solution you’ve been searching for especially those looking for an option with more pressure control where performance is critical. The base pressure is adjustable from 40 to 75 PSI and this regulator features a 1/8′ NPT gauge port. It is gasoline ethanol methanol and diesel compatible. Fuel pressure rises on a 1:1 ratio with boost. This regulator is engineered for A1000 class and smaller pumps.