Radium 20-1022 RA-Series Fuel Pressure Regulator Kit for 99-05 Mazda MX-5 Miata

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

• 1x RA-series adjustable fuel pressure regulator with gauge
• 1x Stainless steel mounting bracket
• 2x 6 AN stainless fuel hoses
• 1x 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.