Hallman Pro RX Boost Controller Purple

The Hallman Pro Kit contains the impeccably designed Hallman Pro valve, the standard by which manual boost controllers are measured. It is machined of billet aluminum and stainless steel pieces, and incorporates new features not currently available on any other manual boost controller. No lock nut is utilized, and no tools are used to adjust your boost. Simply turn the adjustment knob and it stays put. The adjustment knob cannot be lost or come out of the valve (that means perfect protection from over-boosting due to adjustment knob loss - it cannot vibrate loose and come out).