Radium Engineering Direct Mount Regulator DMR-RA | Universal (20-1623-00)

Most regulators make you choose between rail-mount clean and remote-mount practical; this one swivels to do either.

The Radium Engineering DMR-RA Direct Mount Regulator is a compact, high-performance adjustable EFI fuel pressure regulator built around a rotating assembly. Its included 360-degree swiveling adapter threads it straight into any compatible 8AN ORB fuel rail port, such as the ones on every Radium rail, or it mounts remotely with the optional remote mount kit. Tool-less knob adjustment with roughly 1 psi detents replaces the old jam nut and set screw entirely. Compact package, no performance compromise, in black or Radium green.

What You'll Feel

• Pressure changes in seconds by hand, each detent clicking off about 1 psi
• A regulator that tucks into tight engine bays instead of demanding bracket real estate
• Rock-steady pressure from the laminar-flow stainless return orifice
• Freedom to clock the return fitting and vacuum port exactly where your plumbing wants them
• Simple base-pressure checks with a gauge in one of the 1/8" NPT side ports

Features

• Compact adjustable EFI regulator with tool-less detent knob adjustment, approximately 1 psi (+/- 0.5 psi) per detent
• Included 360-degree swiveling adapter mounts the regulator to any compatible 8AN ORB rail port; remote mounting available with kit 20-0624 (sold separately)
• 6AN ORB female main inlet port and 6AN ORB bottom return port with included 360-degree swiveling 90-degree 6AN male return fitting
• Two 1/8" NPT side ports for a gauge, transducer, or temperature probe, with two PTFE-impregnated plugs provided
• Single stainless steel return orifice generates laminar flow for enhanced pressure stability
• Compatible with all gasoline types plus methanol, ethanol, and E85

The Details

The rotating assembly is what makes the DMR-RA flexible. Mounted on-rail, the swiveling 8AN ORB adapter lets the regulator body clock to clear intake plumbing while the return fitting independently swivels to aim the return line. The vacuum reference is equally adaptable, with four included fittings covering a 5mm barb, 1/4" push-to-connect, 3AN male, and a plug for returnless setups. Minimum regulated pressure is 18.5 psi (1.3 bar), with maximum pressure determined by your pump's capability, and the regulator handles single or multiple pump systems. If your rail uses 6AN ORB or 10AN ORB ports instead of 8AN, Radium's port adapters (sold separately) bridge the difference, and off-rail installs use the remote mount kit's bracket and inlet fittings. Add a 0-100 psi gauge in a side port and setting base pressure becomes a two-minute job.

Kit Includes

• 1x Main rotating assembly regulator (black or green per selection)
• 1x Swiveling inlet fitting for 8AN ORB fuel rails
• 1x 6AN male swivel return fitting
• 1x 5mm barbed vacuum fitting, 1x 1/4" push-to-connect vacuum fitting, 1x 3AN male vacuum fitting, 1x vacuum plug (returnless)
• 2x PTFE-impregnated 1/8" NPT plugs

Applications

• Universal: EFI fuel systems, single or multiple pumps
• Direct mount on any compatible 8AN ORB fuel rail port, including all Radium fuel rails
• 6AN ORB and 10AN ORB rails via port adapters, remote mounting via kit 20-0624 (each sold separately)