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Air and Fuel› Fuel Pumps, Regulators and Components

Radium Engineering

Direct Mount Fuel Pressure Regulator Kit

$399.95 $366.71 Save $33.24

SKU: RAD20-0978

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$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

This kit interfaces with factory hard lines and includes a Radium Direct Mount Regulator and a 0-100psi fuel pressure gauge. The 6AN swivel fuel rail fittings are low profile, and the reusable PushLok hose ends allow for customization. The kit uses 3/8" (6AN) high-pressure EFI fuel hose and includes 8AN ORB plugs for the fuel rails.
Show original supplier description
The Radium Engineering Fuel Rail Plumbing Kit provides a comprehensive solution for enhancing the fuel system on Subaru EJ engines. It connects to the factory hard lines near the LH strut tower via SAE quick connects or older hose barb connections. The kit features a low-profile 6AN swivel fuel rail fittings, which are ideal for the confined spaces of the EJ engine. Included are a Radium Direct Mount Regulator (DMR-RA) and a Radium 0-100psi fuel pressure gauge that can be installed at any 6AN junction before the regulator. The included 3/8" (6AN) high-pressure EFI fuel hose can be cut with standard tools and assembled without specialized skills. The kit also comes with 8AN ORB plugs for the fuel rails, to be used when fuel pulse dampers are not employed. This kit is safe for use with alcohol fuels like methanol, ethanol, and E85. Important considerations for installation and compatibility include: this kit does not include a fuel filter, and it is not compatible with the Radium dual port injector fuel rail kit 20-0499.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandRadium Engineering
Part NumberRAD20-0978
CategoryAir and Fuel

Videos

RADIUM FUEL SYSTEM UPGRADE!! (STI)

RADIUM FUEL SYSTEM UPGRADE!! (STI)
PROJECT STi: 08-17 Radium Fuel Pressure Regulator (FPR) Kit - How To Install Tutorial

PROJECT STi: 08-17 Radium Fuel Pressure Regulator (FPR) Kit - How To Install Tutorial

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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