Vehicle Fitment

  • 1999–2005 Mazda MX‑5 Miata NB (1.8 L and 1.6 L, all trims)

Fitment Notes

  • Bolt-on FPR kit for returnless fuel systems
  • Includes bracket designed to mount near EVAP canister using OEM studs
  • No permanent modifications--installation is reversible

Features

  • Adjustable RA‑series fuel pressure regulator with vacuum reference port
  • 360° swiveling vacuum fitting--no tools needed
  • Includes fuel pressure gauge and stainless SAE quick‑connect plug
  • Two 6 AN stainless fuel lines provided for feed and return
  • Stainless mounting bracket and anodized fittings included
  • Compatible with OEM or Radium fuel pump hangers
  • Operates with gasoline and up to E85 ethanol fuels
  • One-year Radium warranty and support from sports‑car specialists

Specifications

  • Fitment: 99–05 NB Miata returnless fuel systems
  • Fitting sizes: Two 6 AN (3/8″) stainless hoses
  • Gauge: 0–100 psi stainless inline
  • Vacuum port: RA-series adjustable, swivel 360°
  • Materials: Stainless lines, anodized fittings, stainless bracket
  • Warranty: 1 year (manufacturer defects)

Included Components

  • 1× RA-series adjustable fuel pressure regulator with gauge
  • 1× Stainless steel mounting bracket
  • 2× 6 AN stainless fuel hoses
  • 1× SAE quick‑connect feed plug
  • Vacuum adapter fittings (multiple options)
  • All necessary clamps, hardware, and instructions

Product Description

The Radium 20‑1022 RA‑Series Fuel Pressure Regulator Kit is engineered for the 1999–2005 Mazda MX‑5 Miata NB, fully compatible with factory returnless systems. Featuring a precision-adjustable regulator and a full swivel vacuum port, it installs cleanly near the EVAP canister using OEM studs, and can be fully removed without altering the fuel system.

Included is a stainless fuel pressure gauge and high-end 6 AN stainless braided lines, plus quick-connect hardware and mounting bracket to simplify installation. Built to handle gasoline or ethanol blends (including E85) with durable anodized fittings and backed by a one-year warranty, the 20‑1022 offers precise fuel control for carb and tuning enthusiasts or performance builds.



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