SUBARU 3-PORT BOOST CONTROL SOLENOID (BCS) WRX 2015-2021

Unlock precise and reliable boost management with the COBB 3-Port Boost Control Solenoid (BCS) for the 2015–2021 Subaru WRX. This electronic boost controller is designed to deliver consistent and repeatable boost levels across a wide range of setups—from stock configurations to high-performance big turbo builds. Unlike the factory solenoid, which is prone to fluctuation, the COBB BCS offers ultra-stable boost control, allowing tuners to dial in aggressive and dependable performance.

Constructed with high-end materials like nickel-coated 1/4" barbed fittings and Viton-sealed internals, this BCS is built for durability and long-term use. It’s fully waterproof and rated for up to 120 psi, making it ideal for both daily drivers and motorsports applications. The plug-and-play harness ensures hassle-free installation with your factory wiring, and it mounts neatly in the stock location using the included billet aluminum bracket.

While tuning is required, the COBB BCS integrates seamlessly with COBB Off The Shelf (OTS) Maps or custom tunes provided by your preferred Protuner. Whether you’re managing boost on a stock turbo or need rock-solid control for an external wastegate system, this solenoid delivers the consistency and accuracy serious builds demand.

⚠️ Tuning Required – Supported in select COBB OTS maps or via custom tuning. Not compatible with northern WRXs equipped with OEM cast aluminum turbo inlet.