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The Radium Engineering FPRD-RA is a high-performance fuel pressure regulator featuring an integrated 1:1 fuel pulse damper. Designed for motorsport and high-performance street applications, it delivers outstanding pressure control, broad fuel compatibility, and versatile installation options.
Whether upgrading for race use, E85, or high-boost builds, the FPRD-RA offers unmatched reliability, compact mounting flexibility, and innovative tool-less adjustment.
Key Features
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Compact Mounting: Two M6x1mm threaded mounting holes with an anodised aluminium bracket included. Can be mounted in any orientation, including upside down.
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Flexible Plumbing: Large 10AN ORB ports for side inlet and bottom outlet. Includes -6AN and -8AN male adapter fittings for easy system integration.
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Auxiliary Port: 1/8" NPT port for optional fuel pressure or temperature sensors. Pre-impregnated PTFE plug included.
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Fuel Pulse Damper: Integrated 1:1 damper stabilises pressure fluctuations from pumps, injectors, and rails.
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Tool-less Pressure Adjustment: External adjustment knob with incremental detents for precision tuning (1 psi per click).
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360° Swivelling Vacuum Port: Industry-first design with a double O-ring seal. No tools required for repositioning.
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Wide Fuel Compatibility: Compatible with all types of petrol (unleaded, leaded, oxygenated) and alcohol-based fuels including E85 and methanol.
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Optimised Pressure Stability: Stainless steel return orifice enhances laminar flow and maintains consistent pressure.
Pressure Range
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Minimum Pressure: 18.5 psi (1.3 bar)
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Maximum Pressure: Dependent on the fuel pump’s relief valve or controller settings.
Fuel System Notes
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Must be installed after the fuel rail (not suitable for dead-head systems).
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For dead-head applications, use Radium’s Multi-Port Regulator (MPR).
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Medium-strength threadlocker is recommended for vacuum fitting installation.
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Not intended for use on the low-pressure side of mechanical fuel pumps.
Vehicle Compatibility
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Universal fitment for aftermarket fuel systems.
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Ideal for high-horsepower street, track, and motorsport vehicles.
Contents
FPRD-RA Regulator with Integrated Damper
Anodised Aluminium Mounting Bracket with M6x1mm Hardware
2x 5mm Barbed Vacuum Fittings
2x Vacuum Plug Fittings for Returnless Systems
2x 1/4" Push-To-Connect Fittings
2x 3AN Male Vacuum Fittings
2x -6AN Male Adapter Fittings
2x -8AN Male Adapter Fittings
1/8" NPT Port Plug
5/32" ID Vacuum Hose and Y-adapter
No instructions available for this product.

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