The HKS Equal Length Header (Exhaust Manifold) for the Subaru EJ25 motor works on the 04-14 Impreza WRX STI and the new 15+ WRX STI. It replaces the OEM header for better flow and performance using a 4-1 setup to improve low range and high range performance (mid range is at oem level) with all things the same. Increase exhaust flow with improved spool, providing a win win situation.
This is a great product for those looking to push power from their OEM turbo setup or those using OEM style 2-bolt flanged pipes. This is also a great addition to lower EGT.
This item includes all necessary hardware for an easy installation.
**Going from unequal to equal length will change exhaust note from rumble to a higher pitch**
Applications:
- Subaru WRX STI [VAB] (2015, 2016, 2017, 2018, 2019)
- Subaru Impreza WRX STI [GVB] (2011, 2012, 2013, 2014)
- Subaru Impreza WRX STI [GRB] (2008, 2009, 2010, 2011, 2012, 2013, 2014)
- Subaru Impreza WRX STI [GDB] (2004, 2005, 2006, 2007)
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Features
- 4-1 Exhaust Manifold (almost 4-2-1 setup)
- Quad 42.7mm to dual to single 52mm piping
- Increasing Low/High range power (mid range same as OEM)
- Can be used with the oem Oil Pan
- Made of SUH409 Steel
- Made in Japan
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