Process West Intake Manifold Street Version Subaru STI 2004-2021 | PWIM002 FocusRS_2016-2018 Eliminates excessive drivetrain slop

Eliminates excessive drivetrain slop

The Go Fast Bits Response blow-off/bypass valve system for 02-07 WRX and STI is much more than simply a noise maker or a factory valve replacement

Enhances traction and drivetrain efficiency

An advanced twin piston shock design separates the ER series from rest of the pack

Engineered to provide the highest degree of protection and improvement of differential efficiency for better mileage

Process West Intake Manifold Street Version Subaru STI 2004-2021 | PWIM002 FocusRS_2016-2018 Eliminates excessive drivetrain slopProduct Fitment: 2004 2021 Subaru STI The Process West Billet Intake Manifold range represents the pinnacle of design, engineering, and performance for Subaru WRX and STI platforms. Born from years of R&D, extensive testing, and countless prototype iterations, this manifold is the result of a no compromise approach to performance and aesthetics. Crafted for both street and race applications, the manifold is available in multiple configurations to suit