Radium Engineering Top Feed Upgrade Fuel Rails (Top Port) Subaru WRX / STI (EJ20 / EJ25)

Radium Engineering Top Feed Upgrade Fuel Rails (Top Port) - Subaru WRX / STI (EJ20 / EJ25)

These Radium Engineering top feed upgrade fuel rails (SKU 20-0577-02) replace the factory rails on Subaru EJ intake manifolds that are already fitted with top feed injectors. Unlike the 20-0567-02 rails, which have a port on the underside centre, these rails use 8AN ORB top ports – giving the clearance needed on engines with early-style vertical AVCS solenoids such as the EJ207 and JDM EJ205.

They are machined from 6061 aluminium and anodised, bolt directly to the OEM intake manifold bosses and suit all fuel types including E85. The rails accept factory or OEM-equivalent injectors with 11mm upper O-rings.

Note: Match your intake manifold to the correct Radium rail part number before ordering. 2003–2006 JDM WRX STI, 2004–2011 Impreza (EJ253), 2005–2010 Forester (EJ253), 2005–2012 Legacy (EJ253) and 2006–2009 Outback (EJ253) also require Radium adapter 20-0372 (sold separately). Fittings are not included. For upgraded injectors, consult your injector supplier. Installation by a professional is recommended.

Features

• Top feed upgrade rails for factory top feed EJ manifolds
• 8AN ORB top ports for vertical AVCS solenoid clearance
• Accepts OEM or OEM-equivalent injectors (11mm upper O-ring)
• Direct bolt-on to OEM intake manifold bosses
• 6061 aluminium, anodised
• Suits all fuel types including E85

Pairs Well With

• Radium Engineering Injector Seats (22mm) - Subaru WRX STI (EJ257)
• Radium Engineering Fuel Rail Plumbing Kit (Parallel) - Subaru WRX / STI (EJ20 / EJ25)
• Radium Engineering Fuel Rail Plumbing Kit (Series) - Subaru WRX / STI (EJ20 / EJ25)
• Radium Engineering Intake Manifold Gasket - Subaru WRX / STI (EJ20 / EJ25)
• Radium Engineering Fuel Pump Hanger - Subaru WRX / STI (GR / GV / VA)

Need help confirming fitment? Contact our team at sales@chicaneaustralia.com.au.