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PSR all stainless steel exhaust manifolds are a tried and true solution for improving more power and torque through the entire RPM range of your Subaru. These single scroll Unequal length exhaust manifolds suit all EJ20/EJ25 single-scroll turbo Subarus including Classic GC8/GF8, GDA/GDB, GH/GE/GR/GV and the final gen VAB STI. Lost wax finished flanges with a 4-1 collector and a smooth inner surface allows for better flow and reliability. Stable connection and air leakage of the exhaust manifold is avoided by the 3 bolts flange design up-pipe. A larger pipe diameter of all sections enables better flow of exhaust allowing for higher power and torque and better turbo spool.


All PSR headers are covered by a limited 1 year warranty.



  • High Efficiency 4-1 Type Collector
  • Unequal Length Design
  • Increased 60mm Bore Size of Up Pipe
  • Dry racing, rumble sound
  • Lost Wax flanges for high strength
  • Lightweight and Rust Resistant SUS304 contruction
  • Gaskets and Hardware included


Included Components:

  • Exhaust manifold 
  • Up pipe
  • Turbo gaskets
  • Hardware kits


Vehicle Fitment:

  • 1994-2000 Subaru WRX
  • 2001-2007 Subaru WRX
  • 2008-2014 Subaru WRX
  • 1994-2000 Subaru STI
  • 2001-2007 Subaru STI
  • 2008-2014 Subaru STI
  • 2015-2021 Subaru STI
  • 1997-2002 Subaru Forester GT
  • 2003-2008 Subaru Forester XT
  • 2008-2013 Subaru Forester XT
  • 1989-1993 Subaru Liberty RS
  • 1994-1998 Subaru Liberty RS
  • 1998-2003 Subaru Liberty B4 (single-turbo)
  • 2007-2009 Subaru Liberty GT (single-scroll)


  • Type: Unequal Length, Single Scroll
  • Material: Stainless Steel SUS304
  • Manifold Spec: I/D – 42.7mm, Thickness – 2.0mm, Weight - 7.3kg
  • Up Pipe Spec : I/D – 60.5mm, Thickness – 2.0mm, Weight - 1.9kg
  • Flange Thickness: 12mm
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