Making Automotive Dreams a Reality. Mitsubishi Eclipse / Talon DSM. Mitsubishi Evo 8 / 9. Subaru BRZ / FR-S / GT-86. BLOX Racing 2-Port Design Blue/Silver Adjustable Fuel Pressure Regulator -6an. The BLOX Racing Competition 2-Port adjustable FPRs are designed to offer high performance and reliability. Each FPR unit comes pre-assembled from BLOX and is guaranteed to offer consistency each time the engine is turned on. These billet aluminum units feature -6AN inlet and return ports in-line which offers more flexibility during installation, 1/8 NPT ports, are compatible with gasoline, diesel, methanol and ethanol. FPRs are designed to work with aftermarket fuel rails and are available in an assortment of color combinations. Questions about this item? International Buyers – Please Note. We welcome your inquiry!