SKU: 20-1623-01
Radium Engineering Direct Mount Regulator (DMR) 8AN ORB - Green
Upgrade your fuel system with the Radium Engineering Direct Mount Regulator (DMR) 8AN ORB - Green, a compact EFI fuel pressure regulator designed for high-flow performance applications. The Radium 20-1623-01 mounts directly to a compatible 8AN ORB fuel rail for a cleaner installation with less plumbing, while delivering stable fuel pressure for naturally aspirated, boosted, gasoline, and E85 setups.
Built for serious street and race vehicles, this Radium fuel pressure regulator features tool-free adjustment, a compact direct-mount design, and compatibility with gasoline and alcohol-based fuels. It is a strong choice for builders searching for an 8AN ORB fuel pressure regulator, E85 fuel pressure regulator, or direct mount EFI regulator.
Key Features
- Direct Mount Design for compatible 8AN ORB fuel rails
- Compact high-flow regulator for EFI fuel systems
- Tool-free pressure adjustment
- 360 degree swivel inlet adapter for easier hose routing
- 1:1 rising rate vacuum reference
- Compatible with gasoline, ethanol, methanol, and E85
- Two 1/8 NPT ports for pressure gauge or sensor options
- Green anodized finish with Radium Engineering quality construction.
Specifications
- Part Number: 20-1623-01
- Brand: Radium Engineering
- Product Type: Direct Mount Regulator (DMR)
- Fuel Rail Fitment: 8AN ORB
- Main Inlet Port: 6AN ORB female with included adapter for compatible 8AN ORB fuel rail ports
- Fuel Compatibility: Gasoline, ethanol blends, methanol, and E85
- Color: Green
What’s Included
- Radium Engineering DMR rotating assembly
- Swiveling inlet adapter
- Vacuum fittings
- 1/8 NPT plugs
- Additional hardware for installation
Why Choose the Radium DMR?
The Radium Direct Mount Regulator is ideal for performance EFI builds that need a compact, reliable, and easy-to-adjust fuel pressure solution. Its direct-mount layout helps simplify plumbing, while its high-flow design supports demanding fuel systems without sacrificing control.
Engine
This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...
View Engine Products
Fuel Delivery
A properly designed fuel delivery system is the backbone of any high-performance engine build, ensuring the injectors or carburetor receive a consistent supply of fuel at the correct pressure regardless of engine load, RPM, or fuel demand. From factory replacement pumps keeping daily drivers on the road to high-flow in-tank modules supporting 1000-horsepower builds, the right fuel delivery components prevent lean conditions, injector damage, and fuel starvation at the worst possible moment. Modern EFI systems are particularly sensitive to fuel pressure variation, with even small drops causing misfires and power loss under hard acceleration. Whether you are restoring a factory system or engineering a purpose-built race setup, matching pump flow rate and fuel pressure regulation to your injector and engine requirements is essential. Popular Upgrades Top-selling fuel delivery components include Aeromotive Phantom in-tank fuel pump kits that retrofit into factory tanks without custom fa...
View Fuel Delivery Products
Fuel Pressure Regulators
A fuel pressure regulator maintains consistent rail or bowl pressure regardless of engine demand, fuel pump output variation, or manifold vacuum changes, acting as the pressure control valve that determines how much fuel the injectors or carburetor actually sees at any given moment. In return-style EFI systems, the regulator bleeds excess fuel back to the tank while holding the supply side at a precise setpoint, typically 43.5 PSI for most port EFI applications. In boost-referenced setups, the regulator increases fuel pressure proportionally with boost pressure to maintain a constant fuel-to-air pressure differential as manifold pressure rises, preventing the injector effective flow rate from dropping under boost. Selecting the correct regulator type, pressure range, and port sizing for your system determines how accurately fuel delivery tracks engine demand across the full operating envelope. Popular Upgrades Top-selling fuel pressure regulators include the Aeromotive 13129 adjusta...
View Fuel Pressure Regulators Products
Radium Engineering Fuel System Parts
Shop Radium Engineering fuel system parts at Black Ops Auto Works for high-performance street builds, track cars, drag racing applications, forced induction setups, engine swaps, and custom fuel system upgrades. This collection includes Radium fuel rails, fuel pressure regulators, fuel surge tanks, fuel hangers, fuel pump systems, fuel pulse dampers, PTFE hose kits, AN fittings, fuel cell parts, dry break fillers, catch cans, PCV systems, plumbing kits, and fuel system accessories. Radium Engineering is trusted by performance enthusiasts, fabricators, tuners, and motorsport builders for precision fuel delivery, clean installation, and reliable performance under demanding conditions. Whether you are upgrading fuel flow, adding a surge tank, converting to top-feed fuel rails, building a return-style fuel system, or improving crankcase ventilation with a catch can setup, Black Ops Auto Works carries Radium Engineering parts for serious performance builds. Shop Radium Engineering Parts ...
View Radium Engineering Fuel System Parts Products


