The COBB 3-Port Boost Control Solenoid (BCS) is the go-to solution for MAZDASPEED3 and MAZDASPEED6 owners looking to eliminate boost inconsistencies and unlock full turbo control. Designed for modern high-performance builds, this compact and rugged unit allows for accurate and repeatable boost management with an impressive range of up to 120psi.

Precision-engineered with nickel-coated 1/8″ barbed fittings, Viton-sealed internals, and a waterproof grommet-sealed harness, the COBB BCS is built for longevity and resistance to harsh engine bay conditions. It mounts easily in the factory location and connects directly to the OEM harness no splicing required. Whether you’re targeting stock boost levels or pushing big power, this BCS delivers reliable performance for any tuning scenario.

Each kit includes an anodized aluminum mounting bracket, stainless steel hardware, zip ties, and high-quality boost line to ensure a clean and secure install. Internal and external wastegate routing instructions are included for easy setup.

Note: Custom tuning is required to use this product.