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Our Price: $199.95
Anodized Color
Pressure Gauge

Description  more details

Click here to download installation instructions (PDF)

The Multi Port Regulator (MPR) is the ultimate solution for simple or complex high-flow fuel systems. It's unique port configuration makes it ideal for combining several fuel pumps into a single feed line or vice versa. However, it can also be used for single pump applications by simply plugging the unused ports.

The MPR can be plumbed many different ways to suit most any installation; traditional flow-through or dead-end systems. Because of this flexibility, it is also perfect for Radium fuel systems by eliminating the need for an extra "Y" fitting. The lower 2 opposing return ports are unique in that they flow parallel with the pressure ports eliminating the need for elbow fittings. Either lower port can be used for the return line, just plug the one not used (a plug is included).

This regulator can be floor mounted. Alternatively, wall mounting can be accomplished by not using the included mounting bracket and simply mounting using the holes that pass through the body, or by mounting the regulator sideways.

Two interchangeable orifices are included to match the amount of fuel bypassed for the application. Furthermore, this added precision will resist diaphragm flutter and optimize pressure stability. See the installation instructions for more details. The 1:1 vacuum reference high flow design has been tested to regulate over 1,400 liters per hour (see MORE DETAILS tab). Furthermore, with the addition of interchangeable return orifices, the regulator is a good match for stock street cars or highly modified drag cars! It is compatible with all gasoline and alcohol blends of fuel including E85. Fuel pressure is dialed in using the preload set screw on top. 


-Multi-Port Regulator
-Mounting bracket with hardware
-Interchangeable return orifices 
-6AN ORB plug (x2)
-8AN ORB plug (x1)
-6AN male adapter (x3)
-8AN male adapter (x1)

Click the MORE DETAILS tab above for more technical flow rate information.


Select the anodized color of the MPR's CNC machined billet top:
Bright Dipped Black

Radium Green

Pressure Gauge

If the fuel pressure gauge and O-ring adapter P/N: 14-0119 is selected, the 3/4"-16 (-8AN) port can no longer be used. 

Alternatively, this gauge adapter HERE can be used on one of the -6AN ports.

The graph below shows the minimum fuel pressure the regulator can achieve as a function of pump flow rate. This test was performed with the adjustment screw completely backed out, no preload.

For example, if you have two pumps that flow 320LPH (total 640LPH), the approximate minimum pressure the regulator can achieve is about 23.5 psi. Note: if an OEM fuel pressure regulator is used for 640LPH, it will likely not be able to bypass enough fuel.

With the Radium MPR, simply spin the set screw clockwise to achieve higher pressures. Note: Most EFI systems operate at 43.5 psi (3Bar) static fuel pressure.


Average Rating:
(based on 1 review)

Showing 1 Review:

by Matthew
on 2/10/2015
My 1st Experiance with Radium
I recently purchased this regulator and Radium fuel rail for my Evo X. I am very happy with the quality of this part, it is SOLID. I did have a bit of trouble at first the diaphragm had an issue but I contacted Radium and they had a replacement part out in the mail to me almost instantly, in my opinion a company that will take care of you and A+ customer service. This FPR is very easy to install and has a wide range of configurations that it extremely versatile. I would recommend this regulator to anybody who is looking for an aftermarket fuel pressure regulator.
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