



Radium Engineering Top Feed Upgrade Fuel Rails w/Top FPD Port for Subaru WRX/STI/Forester
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Description
Radium Top Feed Upgrade Fuel Rails w/Top FPD Port - Subaru WRX/STI/Forester
Application: Subaru EJ with OEM top feed injectors where early AVCS solenoid clearance is required (EJ207, JDM EJ205) and EJ253 models (see Vehicle Fitment)
Part Type: Top feed upgrade fuel rails (top port)
Part Number: 20-0577-02
Radium Engineering top feed upgrade rails fit Subaru EJ intake manifolds that already use top feed injectors, and retain the OEM or OEM-equivalent injectors. This version features a top port design that provides clearance for the early AVCS solenoid used on the EJ207 and JDM EJ205.
Each rail is machined from 6061 aluminium, black anodised and laser etched, and uses thermal insulating press-in spacers to help insulate the rails from intake manifold heat. The ports are tapped for 8AN ORB fittings, giving flexibility to plumb the regulator, pulse damper and gauge to suit your fuel system.
Key Features
- Top Feed Upgrade: Retains OEM or OEM-equivalent top feed injectors
- Top Port Design: Clears the early AVCS solenoid on EJ207 and JDM EJ205
- Billet Construction: 6061 aluminium, black anodised and laser etched
- 8AN ORB Ports: Flexible fuel system plumbing
- Thermal Spacers: 20mm insulating press-in spacers
- Stainless Hardware: Stainless steel mounting hardware
What's Included
- Aluminium fuel rails
- 20mm thermal insulating press-in spacers
- Stainless steel hardware
Optional Parts
- Radium Fuel Rail Adapter - Subaru Ver8/9 EJ207, 2.5i EJ253 (20-0372) – adapter brackets required for 2003-2006 WRX STI (JDM) and EJ253 applications
Important Notes
- This is an upgrade rail – OEM or OEM-equivalent injectors must be used (same height and matching upper and lower O-ring diameters and styles)
- Fuel injectors are not included
- Radium does not make injector recommendations – consult your tuner for brand and flow rate
- 8AN ORB fittings are sold separately and must be selected to suit your application
- Allow ample space around the ports for regulators, gauges and pulse dampers – check clearance using Radium's dimensional drawings
- 2003-2006 WRX STI (JDM) and EJ253 Impreza, Forester, Legacy and Outback applications require the Radium 20-0372 adapter brackets
- Installation instructions are available in the Instructions tab
Vehicle Fitment
- Subaru Impreza WRX (JDM/EDM) 2001-2006
- Subaru Impreza WRX STI (EDM) 2001-2006
- Subaru Impreza WRX STI (JDM) 2001-2002
- Subaru Impreza WRX STI (JDM) 2003-2006 – requires 20-0372
- Subaru Impreza (EJ253) 2004-2011 – requires 20-0372
- Subaru Forester (EJ253) 2005-2010 – requires 20-0372
- Subaru Legacy (EJ253) 2005-2012 – requires 20-0372
- Subaru Outback (EJ253) 2006-2009 – requires 20-0372
If you're unsure whether this will fit your vehicle, contact our team of experts via email at hello@iilumolab.com and send through a few photos of the car for us to verify fitment.
Installation
We always recommend professional fitment for guaranteed satisfaction. If you're wanting a hassle-free installation, feel free to contact our friendly team as we offer installation services in-store at our Melbourne workshop. For more details, contact us here.
Note
Upon receiving the item, please ensure that the part is indeed the correct item you have ordered. This can be achieved by checking labels on the packaging. Please also ensure a proper test fit of the item is conducted prior to paint and/or installation. Returns/Warranty claims will be voided if the item has been tampered with, or is no longer in resalable/new condition.

