Raceworks EFI Adjustable Fuel Pressure Regulator 700hp. Raceworks Fuel Pressure Regulators are machined from high grade 6061-T6 Billet aluminium. These regulators are an ideal upgrade to your fuel system whether it be a flow through or dead head system and will support up to 1000hp. All regulators come with 1/8 NPT gauge and boost/vacuum reference ports, compatible with all known fuels and are fully adjustable with a rising rate of 1:1. Brackets and screws supplied. Ports: 2 x AN-6 Inlets, AN -6 Return, 1/8? NPT Gauge Port. Operating Pressure: 40 75PSI. Type: Adjustable, 1:1 Rising rate. Fuel Type: Compatible with All Fuels. We have prepared answers to our most frequently asked questions. Performance is an Australian, family run company that sells genuine, quality performance parts from Bosch, Walbro, Turbosmart, Raceworks, BMC, Siemens, Nason, Permaseal, Fel-Pro, ARP and more, including Fuel Pumps, Fuel Injectors, Air Filters, Wideband O2 sensors, Wastegates, BOVs, Surge Tanks, Hose, AN Fittings and more. We also sell J3 Chips, Programmers, and DIY Tuning Kits to tune Ford E-Series (EA, EB, ED, EF, EL), XG and XH Falcon, Fairmont, Fairlane, XR6 and XR8 models.