Process West Intake Manifold Track Version Reverse Rotation Black 2004-2021 STI

The Process West range billet manifolds is a no holds barred manifestation of what is possible under the hood of a WRX/STI when perfect aesthetics meet high end performance. What you see here is the result of years of research and testing, multiple prototypes and a ground up fully featured design process that makes this a key asset of our product range. Featuring a full billet plenum, with generous billet bell mouths and thick wall polished CNC mandrel bent tube components. High end TIG welding assembly makes them suitable for up to 100psi boosted applications. 

This is the pinnacle of induction systems for the Subaru WRX/STI range. The plenum volume and runner length combination has been optimized for brutal low and mid range torque while increasing top end power aggressively.

Designed for vehicles not running AC, and for applications running track oriented rotated setups where custom intercooler pipe routing will need to be fabricated.

Note: This configuration is reverse rotation, for cars with drive-by-wire throttle bodies.