Skip to content
CONTACT SALES: +61 2 5500 7523
CONTACT SALES: +61 2 5500 7523

Language

Country

Radium Series Fuel Rail Plumbing Kit w/DMR RA Regulator - Subaru WRX/STI/FXT/LGT (EJ20/EJ25)

SKU 20-0978
Original price 2,244.55 SR - Original price 2,244.55 SR
Original price
2,244.55 SR
2,244.55 SR - 2,244.55 SR
Current price 2,244.55 SR

These plumbing kits are designed to compliment Radium Engineering Subaru EJ fuel rail installations. Both kits interface with the factory feed and return hard lines in the engine bay (near the LH strut tower) and provide all the underhood fuel plumbing. Both kits are compatible with all Radium Fuel Rails for the Subaru EJ engines (excluding 20-0499 Fuel Rails). All necessary fittings and hoses are included, along with a RA-Series FPR. 

RA-series regulators feature the first tool-less pressure adjustment. A jam nut and set screw are no longer required. With a simple turn of the knob, pressure will be increased or decreased. To aid in adjusting pressure, there are incremental detents that provide haptic feedback to the user. Every detent permits 1psi (+/-0.5psi) of adjustment depending on current fuel pressure. Furthermore, RA-series regulators feature a 360 degree swiveling vacuum reference port that is double O-ring sealed. This is the first in the industry. It permits the installer to quickly point the vacuum fitting in any direction with no tools required.

 

There are 4 interchangeable 10-32 threaded vacuum port fittings provided to cover all scenarios:

  1. Barbed Fitting: A black zinc-plated 3/16" (5mm) barb machined from high strength steel that is compatible with the following vacuum hoses: 5/32" (4mm), 3/16" (5mm), and 7/32" (6mm).
  2. 3AN Male Fitting: A black zinc-plated adapter machined from high strength steel that is compatible with 3AN hose ends.
  3. Push-To-Connect: A nickel-plated brass fitting with Buna-N O-rings that is compatible with hard plastic 1/4" OD tubing.
  4. Vacuum Plug: A black oxide stainless steel screw that is used to maintain a constant (non dynamic) fuel pressure. 

Two kits are offered; one that feeds the fuel rails in series, and another that feed the fuel rails in a parallel configuration. Both kits perform equally well. The end decision is based on personal preference. Scroll down for details on each kit.

 

IMPORTANT NOTES

  1. Neither kit includes a fuel filter.
  2. Neither kit is compatible with Radium dual port injector fuel rail kit 20-0499.
  3. Both kits are safe to use with alcohol fuels such as methanol, ethanol, E85 etc.
  4. Both kits use 3/8" (6AN) high pressure EFI fuel hose.

 

FUEL RAIL PLUMBING KIT, SUBARU EJ, SERIES

This kit is compatible with all Impreza (WRX/STi) platforms that use an EJ motor. For early vehicles with an engine bay mounted fuel filter, consult the installation instructions.

This kit interfaces with the factory hard lines near the LH strut tower using SAE quick connects or older hose barb connections. An adjustable Radium Direct Mount Regulator (DMR) and Radium 0-100psi fuel pressure gauge are included. The fuel pressure gauge can be installed at any of the 6AN junctions before the regulator using the included adapter. The 6AN swivel fuel rail fittings are low profile making them ideal for the tight spaces associated with the EJ motor. The variety of reuseable PushLok hose ends permit customizing (such as adding a flex fuel sensor) making installation quick and painless. The included 6AN fuel hose can be cut with standard tools and assembled without special skills. Unlike standard low-quality rubber fuel hose that degrades with alternate fuels, the provided hose is resistant to all fuels including E85.
The contents of the 20-0578 kit are shown in the photo below.

 

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
Shipping Policy
  • We endeavour to ship all regular and stocked items on same day, next day or within 5 business days of your order being placed
  • Custom orders may take longer than regular shipping times but will have information about shipping time on the listing
  • We take extra care in packaging your orders to ensure you quality parts arrive safely
  • PRP accepts no responsibility for damage or loss to items/products/services from courier or shipping companies once we have received receipt for the third-party service
  • All Items purchased from PRP are to be installed by a qualified mechanic at a licensed workshop
  • Modifying your vehicle is illegal in some states and territories, the customer acknowledges that it is their responsibility to abide by the law and take the appropriate measures to ensure that their vehicle is roadworthy
  • PRP assumes no responsibility for any work carried out, modifications made or parts supplied with regards to road use, as all our products are intended for track use only
Warranty/Refund Policy