3-Port Boost Control Solenoid (BCS)

• 2015–2021 Subaru | WRX

The COBB 3-Port Boost Control Solenoid provides stable, repeatable boost control for 2015–2021 Subaru WRX vehicles and installs in the factory location with a direct plug-in connection. Its compact nickel-plated fittings, durable Viton internals, waterproof construction, billet aluminum mount, and included boost line make it a precise, serviceable upgrade for stock or high-boost setups when paired with the required tuning changes.

• Fits 2015–2021 Subaru WRX sedan CVT and manual-transmission applications, including USDM and ADM listings
• Accurate and consistent boost control across stock and high-boost configurations
• Plug-and-play 18-gauge wiring harness
• Nickel-plated 1/4-inch barbed fittings for corrosion resistance
• Viton spool and seals for long service life
• Rated for operation up to 120 psi
• Billet aluminum mounting block with stainless hardware
• Includes boost line and zip ties for clean routing
• Direct factory-location installation; no wiring modification required
• Tuning is required after installation; use an approved COBB map or a custom protune
• Does not fit some northern vehicles equipped with the Subaru OEM cast-aluminum turbo inlet
• 50-state legal when used according to the application guide; CARB EO D-660-261
• Reference: https://www.cobbtuning.com/products/turbo/subaru-3-port-boost-control-solenoid-bcs-wrx-2015-2021

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