SUBARU 3-PORT BOOST CONTROL SOLENOID (BCS)

The COBB 3-Port Boost Control Solenoid (BCS) is a must-have upgrade for Subaru turbocharged vehicles, designed to deliver precise, stable, and repeatable boost control. The factory boost control system is prone to fluctuations that can compromise consistency, but COBB’s 3-Port BCS eliminates those issues—providing tuners with a reliable foundation for both stock-level boost and high-power builds.

Engineered with 1/8-inch low-profile nickel-coated barb fittings for compact installation, the BCS is built to last with Viton spools and seals, Dow Corning silicone grease lubrication, and waterproof construction. Every component, from the ultrasonically welded solenoid wires to the sealed grommet harness, is designed for long-term durability—even in demanding conditions. Rated to operate up to 120 psi, it provides dependable performance no matter your setup.

Installation is straightforward thanks to COBB’s OEM-style fitment. The solenoid mounts in the stock location and plugs directly into the factory wiring harness. A custom aluminum bracket, stainless steel hardware, boost line, and zip ties are included to make installation clean and simple, with instructions provided for both internal and external wastegate configurations.

⚠️ Custom Tuning Required: This part requires professional tuning to function safely and effectively. Contact your local COBB Protuner for calibration support.