Radium FPR / FPD Adapter - 8AN ORB, 11mm Bore, 32mm Spacing, M5

Suits:

• Subaru applications with OEM FPR/FPD using 11mm bore, 32mm spacing, M5 mounting
• Nissan applications with OEM FPR/FPD using 11mm bore, 32mm spacing, M5 mounting
• Mazda RX-7 applications with OEM FPR/FPD using 11mm bore, 32mm spacing, M5 mounting

The Radium Engineering FPR/FPD Adapter allows an OEM fuel pressure regulator (FPR) or fuel pulse damper (FPD) to be reused in an aftermarket fuel rail application. Machined from anodised billet 6061 aluminium with an 8AN ORB port. All fittings permit the unit to be clocked into the correct position for clean installation.

Specifications

• Port: 8AN ORB
• Bore: 11mm
• Mounting Spacing: 32mm
• Mounting Hardware: M5
• Material: Billet 6061 aluminium
• Finish: Anodised
• Clocking: Adjustable — unit can be clocked into the correct position

Part Number:

• 20-0303 — Radium FPR/FPD Adapter, 8AN ORB, 11mm Bore, 32mm Spacing, M5 (Subaru / Nissan / Mazda RX-7)

Why Radium Engineering?

• ✅ Manufactured in the USA to motorsport-grade tolerances
• ✅ CNC-machined billet aluminium components built for performance and longevity
• ✅ Trusted by high-power build tuners and race teams worldwide
• ✅ Bolt-on fitment — no cutting, drilling, or fabrication required
• ✅ Compatible with E85, pump petrol, and flex fuel sensor integration