Blox Racing Adjustable Fuel Pressure Regulator System 2 Port Black Universal Adjustable Fuel Pressure Regulator (BXFU-00410-BKB) by Blox Racing®. The BLOX Racing adjustable fuel pressure regulator (FPR) is an affordable and easy-to-install alternative to those complicated and expensive aftermarket units. This billet aluminum piece installs on to the factory fuel pressure regulator, turning it into an adjustable unit, allowing users to properly tune the air / fuel ratio. This is ideal for any aftermarket products requiring a bump in fuel pressure. It is designed to work with the factory or an aftermarket fuel rail. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in. Making Automotive Dreams a Reality. Mitsubishi Eclipse / Talon DSM. Mitsubishi Evo 8 / 9. Subaru BRZ / FR-S / GT-86. Blox Racing Adjustable Fuel Pressure Regulator System 2 Port Black Universal. Adjustable Fuel Pressure Regulator (BXFU-00410-BKB) by Blox Racing®. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at an affordable cost. High quality at an affordable price. Expertly made from premium materials. Built to match your exact requirements. Questions about this item? International Buyers – Please Note. We welcome your inquiry!