With the port profile machined to suit ported heads these are a simple upgrade to maximise airflow in all conditions. Available in two lengths, 79mm and 67mm, the shorter of which is required to fit a Process West billet plenum to a GC8. The upper flange surface is O-ringed for a perfect seal to either a stock or aftermarket plenum. Fuel injector ports are machined in such a way that either 11mm or 13mm diameter injectors will seat without needing any adaptors, just use the supplied Viton O-rings as required. Fuel rail mounting points are the same as stock, so it is possible to use this with other aftermarket fuel rails.
Features:
- Suites either 11mm or 13mm Diameter Injectors
- Fuel Rail mounting points are the same as stock
- Available in Raw or Black finish
Notes:
- Tuning required after installation to correct CEL
Vehicle Fitment:
- 2001-2007 Subaru WRX
- 2001-2007 Subaru STI
- 2008-2014 Subaru STI
- 2015-2021 Subaru STI
- 2003-2008 Subaru Forester XT (w/Top-Feed Injectors Only)