Radium 20-1623-01 Direct Mount EFI Fuel Pressure Regulator 8AN ORB, GAS/E85

Vehicle Fitment

• Universal fit for EFI fuel systems (gasoline, E85 compatible)

Fitment Notes

• Mounts directly to 8AN ORB port on most aftermarket fuel rails (adapter available for 10AN).
• Suitable for single-rail and return style fuel systems--requires external return line to tank.
• Not being an OEM vehicle-specific regulator--verify fuel rail port size and clearance before ordering.

Features

• Compact high-flow regulator designed for tight engine bays and high output fuel systems.
• 8AN ORB inlet with included swivel adapter for flexible installation.
• 6AN ORB return port with 90° male fitting for smart routing.
• Tool-free dial adjustment knob allows quick fuel pressure changes without disassembly.
• Two 1/8" NPT ports for gauge or sensor installation enable accurate monitoring.
• Compatible with all fuel types including gasoline, E85 and methanol blends.
• Finished in anodised green aluminium with stainless internals for durability and corrosion resistance.
• Made in USA and backed by Radium Engineering support and documentation.

Specifications

• Part Number: 20-1623-01
• Inlet: 8AN ORB female (swivel adaptor included)
• Outlet/Return: 6AN ORB male, 90° swivel fitting provided
• Adjustment Range: Base ~18.5 psi, tool-free fine adjustment with detents (~1 psi increments)
• Accessory Ports: 2x 1/8" NPT for gauge/sensor
• Media Compatibility: Leaded/unleaded gasoline, E85, methanol blends
• Finish: Green anodised aluminium body, stainless internals
• CAB/CARB: Not CARB legal for sale in California

Included Components

• 1x Radium 20-1623-01 Direct Mount Regulator (green)
• 1x 8AN ORB swivel inlet adapter
• 1x 6AN ORB swivel return fitting (90°)
• 2x Blank 1/8" NPT plugs (for unused ports)
• Instruction manual and tuning guide

Product Description

The Radium 20-1623-01 Direct Mount Regulator (DMR) is a compact, high-performance EFI fuel pressure regulator designed to install directly to 8AN ORB ports on fuel rails or via remote mounting with an adapter. Its swiveled inlet, 6AN return, tool-free adjustment knob and multiple sensor ports make it a great solution for high-flow installations, race builds, E85 conversions or any custom EFI system.

Supporting a wide variety of fuel types and equipped with premium internal construction, this regulator delivers precise fuel pressure control for high-output engines. Its clever packaging and installation flexibility make it suitable for tight engine bays and custom applications. Please verify your inlet/outlet port size, mounting location and system requirements before installation.