Vibrant Performance has simplified the boost adjustment process with the manual boost controller. The controller features a large premium grade brass adjustment knob to precisely add or subtract boost. This manual boost controller is made from a T6061 billet aluminum with a black anodized finish to protect from corrosion. Vibrant Performance also includes a low pressure check valve for use on MAF vehicles which keeps your engine from stalling at an idle. The fittings in the controller are removable for any type of servicing or even line upgrades. The manual boost controller can just about be mounted anywhere as a mounting bracket is included.