Why do I need a 3-port boost solenoid with an aftermarket turbo or downpipe?

Aftermarket turbochargers and downpipes often allow for more airflow than the factory components. A 3-port solenoid offers more precise control over boost pressure, which is necessary to manage these increased airflows safely and effectively, preventing over-boosting.

Is this boost control solenoid kit difficult to install?

This kit is designed as a direct replacement for the factory 2-port solenoid. While it requires working with the turbo system, installation is generally straightforward for someone familiar with these components, typically involving disconnecting and reconnecting vacuum lines and electrical connectors.

Turbo XS 08-21 Subaru WRX STi Boost Control Solenoid Kit

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Turbo XS

Specifications

Brand: Turbo XS
Part #: WS08-BCS
UPC: 053176488561

Turbo XS

Turbo XS 08-21 Subaru WRX STi Boost Control Solenoid Kit

Name: Turbo XS 08-21 Subaru WRX STi Boost Control Solenoid Kit
Brand: Turbo XS
Price: 118.84 USD
Availability: InStock

$118.84

Fits 2008-2014 Subaru Impreza. This Turbo XS boost control solenoid kit replaces your factory 2-port solenoid with a 3-port, which is needed for proper boost control with aftermarket parts.

Key Features

Fits 2008-2014 Subaru Impreza and 2015-2021 Subaru WRX STI.
Replaces the factory 2-port boost control solenoid with a 3-port unit.
Required for proper boost control when using an aftermarket downpipe or upgraded turbocharger.
Helps achieve more precise control over turbocharger boost pressure.
Designed as a direct replacement for the stock solenoid.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Fits these vehicles

Subaru Impreza 2008-2014
Subaru WRX STI 2015-2021

Product Details

If you're upgrading your 2008-2014 Subaru Impreza's turbo system with an aftermarket downpipe or a new turbocharger, you'll likely need a better boost control solenoid. The factory solenoid just can't keep up with the increased airflow, leading to inconsistent or uncontrolled boost levels. This kit from TurboXS is designed to replace that stock 2-port solenoid with a more capable 3-port unit.

A 3-port solenoid offers more precise control over the boost pressure your turbocharger can generate. This is crucial when you've made other modifications, as it helps prevent over-boosting or under-boosting, ensuring your engine runs safely and efficiently. The kit is a direct replacement for the factory part, making installation straightforward for those familiar with turbo system components.

Keep in mind that this part is not CARB approved and cannot be shipped to California. It's a solid option for WRX STI owners looking to fine-tune their boosted engine after other modifications.