Brand new, Never Used or Installed, Vms Racing Adjustable Fuel Pressure Regulator Kit For. MAZDA ENGINES (See Compatibility List for More Info) Regulator unit is Universal but these kits come with a Fuel Rail Adapter that fits Most Mazda Vehicles. VMS Racing Fuel Pressure regulator kits are Manufactured of High Aerospace quality Billet T6061 Aluminum and Specially Anodized in BLACK Color for a Long Lasting Look, Included Also in this kit is Our Best Quality Liquid Filled Fuel Pressure Gauge Kit and a Custom Billet CNC machined Fuel Rail Adapter that will Install in your Stock or Aftermarket Fuel Rail without Any Drilling or additional Modifications. The Fuel Ratio on these regulators is 1:1, Perfect for Boosted Applications. The VMS Racing Liquid Filled 0-100PSI Gauge kit can be Installed in the Fuel Regulator or On Top of your Fuel Filter So you can easily read the Idle Pressure while you Adjust the Fuel Pressure Regulator. VMS Racing Fuel Pressure Regulator Kits Are designed for anyone running a Stock Or Bigger fuel pump and or injectors. Whether you are running too much fuel, need to back off the pressure or need to raise the Stock fuel pressure on your vehicle or if you are on the edge of your current injectors and need to raise base fuel pressure. This is the system for you! VMS Racing Fuel Pressure Regulator Kit Includes. VMS Racing Fuel Regulator Kit. VMS Racing Liquid Filled Fuel Pressure Gauge Kit. Billet CNC Custom Fuel Rail Adapter. High Pressure Fuel Line. Aluminum High Quality Clamps. Pure Silicone Vacuum Hose Kit (Red). Fuel Regulator Installation Bracket. Fuel Hose Fitting and Adapters.