Application specific billet, adjustable fuel pressure regulator.? Specially engineered for fitment and optimum flow and pressure control on Honda and Acura engines.? Provides fully adjustable base fuel pressure, 1:1 rising rate for forced induction engines if necessary and mounts directly to a factory or aftermarket Honda or Accura fuel rail equipped with the factory style fuel pressure regulator mounting pad. Adjustable base pressure from 30-70 PSI. Fuel pressure rises on a 1:1 ratio with boost. Compatible with gas and ethanol based fuels. Connects to the stock fuel rail and return line. 1/8' NPT dedicated gauge/pressure test port. Suitable for pumps from stock flow up to A1000. The same Aeromotive flow and pressure control demanded by top racers and tuners, rolled into a Honda specific, bolt-on package.