Raceworks Adjustable EFI Fuel Pressure Regulator FPR Kit E85 9.5mm 3/8. Raceworks Billet Adjustable Fuel Pressure Regulator. With a Black anodised aluminium finish and E85 ready, this billet fuel pressure regulator is suitable for the most demanding applications including turbo and supercharged. Fully adjustable pressure (40-70psi) with dual AN -6 inlets, and an AN -6 […]