Radium Engineering Radium Engineering MPR RA Multi Port FPR Fuel Pressure Regulator, product image, part 20-1100-00

Radium Engineering MPR RA Multi Port FPR Fuel Pressure Regulator

Name: Radium Engineering MPR RA Multi Port FPR Fuel Pressure Regulator
Brand: Radium Engineering
SKU: 20-1100-00
Price: 366.99 AUD
Availability: InStock

by Radium Engineering

SKU 20-1100-00

$366.99 - $366.99

$366.99

$366.99 - $366.99

$366.99

Quantity

Description

Radium MPR RA Multi Port FPR Fuel Pressure Regulator

Application: Universal - port-injection EFI fuel systems operating between 20 and 150 psi
Part Type: Adjustable multi-port fuel pressure regulator (RA-series)
Part Number: 20-1100-00, 20-1100-01

The Radium Multi-Port Regulator (MPR) is an adjustable RA-series fuel pressure regulator suited to both single and multi-pump EFI fuel systems. Its port layout gives a wide range of plumbing options - it can be run flow-through or dead-head, removing the need for a separate "Y" fitting.

Pressure is set with a tool-less knob - a simple turn raises or lowers fuel pressure without hand tools. Two lower opposing return ports run parallel to the pressure ports so no elbows are needed, and either can be used as the return.

Key Features

Tool-less Adjustment: Turn the knob to raise or lower fuel pressure - no hand tools required
Flexible Plumbing: Flow-through or dead-head configurations without a separate "Y" fitting
Feed Ports: Two 6AN ORB (9/16"-18) and one 8AN ORB (3/4"-16) high-pressure feed ports
Return Ports: Two lower opposing 6AN ORB (9/16"-18) return ports - use one, plug the other
Vacuum Reference: 360° swivelling, double O-ring sealed vacuum port with four interchangeable vacuum fittings
Mounting: Wall mount through the M6 holes in the body, or floor mount with the included bracket
Fuel Compatibility: Common gasolines and ethanol blends

Available Configurations

20-1100-00: Black
20-1100-01: Green

What's Included

Main rotating assembly
Mounting bracket with M6x1mm hardware
5mm barbed vacuum fitting
Vacuum plug fitting (returnless)
1/4" push-to-connect vacuum fitting
3AN male vacuum fitting
6AN ORB plug (x2)
8AN ORB plug (x1)
6AN ORB to 6AN male adapter (x3)
8AN ORB to 8AN male adapter (x1)

Optional Parts

Radium Diaphragm Service Replacement FPR (18-0017) - replacement FPR diaphragm for servicing

Important Notes

Minimum fuel pressure is 1.3 bar (18.5 psi); maximum depends on the fuel pump setup
Unused ports must be plugged (plugs included)
Use a medium-strength wicking thread locker (e.g. LOCTITE 290) on the vacuum fitting and do not over-torque it
A rapid fuel pressure drop after the engine or pump is switched off is normal for aftermarket regulators - pressure resets as soon as the pump is reactivated
Long cranking or slow pressure build-up is not caused by the regulator - it usually points to the feed line draining back to the tank (e.g. a leaking pump module, venturi jet pump or missing check valve)
Installation instructions are available in the Instructions tab

Vehicle Fitment

Universal - any port-injection EFI fuel system operating between 20 and 150 psi

For application support, send your vehicle details to TJ Auto Parts through the Parts Finder.

Compatibility

Supplier-listed applications:
- Universal - any port-injection EFI fuel system operating between 20 and 150 psi

Note: Compatibility information is provided as a general guide only. Some vehicles may have multiple part variations for the same model or engine. To ensure this product is the correct fit and to be eligible for our Fitment Guarantee, please contact our team before purchasing.

FAQs

Can’t find the part you’re looking for?
If you can’t find the part you need, please fill out our Fitment Finder or visit our Contact Us page. One of our expert team members will respond promptly to assist with your enquiry.

How do I make payment?
Payment is completed during checkout. We accept all major payment methods via Shopify Payments including credit/debit cards, Apple Pay, Google Pay, and more. Direct bank transfer is also available please contact us at contact@tjautoparts.com.au for bank details and instructions.

How long will it take to process my order?
We aim to process and dispatch all orders within 1–2 business days. If there are any delays, we will notify you promptly via email.

What if I’ve seen a cheaper price elsewhere?
We always aim to offer the best value. If you’ve found a better price elsewhere, get in touch with us and we’ll do our best to match or beat it.

Where do the products come from?
All products are sourced directly from the manufacturer or authorised suppliers to ensure authenticity. Every item is backed by the manufacturer’s warranty.

Do you offer trade accounts or special pricing?
Yes, we offer trade accounts and pricing for qualified customers. To find out more or apply, simply email us at contact@tjautoparts.com.au and our team will assist you.

To see more FAQs visit our FAQs page or get in touch today.

Shipping & Returns

Shipping Rates
We offer free standard shipping on all orders over $150 (excluding bulky items). For orders under $150. Standard shipping starts at $9.95. Express shipping starts at $14.95. Shipping costs can be calculated in the cart or at checkout. Orders containing bulky items such as batteries, brake discs, liquids, and lift kits may incur additional shipping charges, particularly to remote or regional areas.

Dispatch & Handling
We aim to process and dispatch all orders within 1-2 business days. In the event of any delays, our customer service team will notify you. Tracking numbers are sent via email once your order has been dispatched and can also be accessed from your account.

For enquires on same day delivery or pickup, please contact our team before ordering to check availability. Custom or order in only items may have longer lead times. For more details on shipping, see our Delivery information page.

Returns and Refunds
If you change your mind or need to cancel an order, simply contact us at contact@tjautoparts.com.au within 30 days of delivery. Items should be unused and in their original packaging. A small restocking/admin fee of 5–20% may apply to help cover processing costs. This fee is only applicable at the discretion of our staff and may not apply to all orders. Return shipping is covered by you unless we sent the wrong or faulty item, in which case we’ll take care of it. Once we receive your return, refunds are processed quickly, usually within 48 hours, with up to 5 business days for your bank to complete the transfer.

We’re here to help make returns easy and hassle free! Contact us with any questions.

Warranty
All products come with the manufacturer’s warranty. If you experience any issues, please contact us at contact@tjautoparts.com.au. For full details on warranty coverage and claims, please visit our Returns page.