• Replaces the factory 2-port boost solenoid with a 3-port design
• Required for proper boost control with an aftermarket downpipe or turbo
• Direct bolt-on installation
• Improves boost response and control

Solving a Real Boost Control Limitation

The factory boost control solenoid on this platform uses a 2-port design that simply isn't built to properly manage boost once you've added an aftermarket downpipe or upgraded turbocharger. Turbo XS's solenoid replaces that factory piece with a proper 3-port design, giving the ECU the additional control path it needs to manage boost accurately with those kinds of modifications. Without this upgrade, a modified WRX can experience boost spikes, overboost, or generally inconsistent boost control. That's exactly the kind of thoughtful design worth paying for.

A Required Upgrade, Not an Optional One

This part is genuinely required for proper boost control once you've installed an aftermarket downpipe or turbocharger, rather than being a nice-to-have performance accessory. Installation is a straightforward bolt-on swap for the factory solenoid, so there's no need for extensive wiring or fabrication work. If you've already made those other modifications and haven't addressed this yet, it's likely overdue. For a component this critical, that level of engineering is worth having.

Straight From Subispeed

A necessary upgrade for 2008-2014 Subaru WRX once you've added an aftermarket downpipe or turbo — proper boost control depends on it.

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