Radium Engineering DMR (Direct Mount Regulator) – Universal

The Radium Engineering Direct Mount Regulator (DMR) is a compact, high-performance EFI fuel pressure regulator designed for flexibility and tight engine bay installations. Featuring tool-less pressure adjustment and a unique swivelling mounting design, it can be installed directly onto compatible fuel rails or mounted remotely with optional accessories. Ideal for both street and race applications.

Key Features:

• Direct-mount design with 360° swivelling fuel rail adapter
• Tool-less fuel pressure adjustment with detent clicks (1 psi per increment)
• Compact form factor ideal for confined spaces
• Laminar flow stainless return orifice for excellent pressure stability
• Dual 1/8" NPT ports for gauges or sensors
• 360° swivelling vacuum reference port with 4 fitting options

Mounting Options:

• Mounts directly to any compatible 8AN ORB Radium fuel rail using included swivel adapter
• Can be relocated using optional off-rail mount (Radium P/N 20-0624, sold separately)
• Designed for return-style fuel systems (must be installed after the fuel rail)

Plumbing & Ports:

• Fuel inlet: 6AN ORB (includes swivel fitting for 8AN ORB rails)
• Fuel return: 6AN ORB bottom port with 90° 6AN male swivel fitting included
• (2) 1/8" NPT ports for gauge, transducer, or sensor use

Vacuum Reference Options (Included):

• 3/16" barbed fitting – suits 5/32", 3/16", or 7/32" hose
• 3AN male fitting – for braided hose ends
• Push-to-connect fitting – for 1/4" OD hard plastic tubing
• Vacuum plug – for use in returnless or static pressure systems

Fuel Pressure Range:

• Minimum: 18.5 psi (1.3 bar)
• Maximum: Dependent on fuel pump system – regulator is not pressure limited

Fuel Compatibility:

• Unleaded, leaded, and oxygenated petrol
• Methanol, ethanol, and E85 blends

Included Components:

• Main rotating regulator assembly
• Swivel inlet fitting for 8AN ORB fuel rails
• 6AN male swivel fitting for return port
• 3AN male vacuum fitting
• Push-to-connect vacuum fitting (1/4")
• Barbed vacuum fitting (5mm)
• Vacuum plug for returnless setups
• (2) Pre-impregnated PTFE 1/8" NPT plugs

The DMR offers unmatched adjustability, versatility, and packaging efficiency. Whether you're tuning for high power or simplifying your fuel system layout, this regulator provides clean routing, premium components, and stable performance under pressure.