Haltech Boost control solenoid, for used in Haltech ECU boost control applications, either on open loop mode or closed loop boost control. On Sport Series , during closed loop boost control the ECU will be able to tune itself to the target Boost pressure to compensate for environment changes like altitude increase or slight mechanical changes withing the turbo system , included are required fittings, and instructions .

While using a simple mechanical boost tap (Open Loop Control) is a very popular boost control method, using Closed loop boost control will offer more boost lower in the rev range, and therefore more useable power in the RPM ranges that get used most frequently, try the ECU-based boost control.

Closed Loop boost control system is a more direct and responsive way of maintaining a flat boost curve as it puts the ECU in charge of the solenoid. A correctly programmed ECU will get the boost up quicker while still hitting the same maximum power output.

The beauty of using this system is that the more powerful your engine, the better it works