The Radium Engineering DMR-RA is the rotating-assembly version of the Direct Mount Regulator, adding tool-less pressure adjustment and a 360-degree swiveling, double o-ring sealed vacuum reference port. It mounts directly to Radium fuel rails via an 8AN ORB union and includes a swiveling fitting. Finished in black.
The 1:1 vacuum-reference design flows over 1,400 lph with interchangeable orifices for stable pressure. Either lower -6AN ORB port serves as the return, with 1/8in NPT side ports for a gauge or sensor.
Specifications
| Series | DMR-RA (Rotating Assembly) |
| Type | Vacuum-referenced fuel pressure regulator |
| Mount | Direct 8AN ORB union, swiveling fitting |
| Adjustment | Tool-less knob |
| Vacuum Port | 360-degree swivel, double o-ring sealed |
| Return Ports | 2x -6AN ORB |
| Flow | 1,400+ lph |
| Ratio | 1:1 vacuum reference |
| Finish | Black |
| Part Number | 20-1623-00 |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
