Want more boost? The CO2 boost control system is the key ingredient to raising and controlling your boost levels easily with your boost controller.The system provides CO2 pressure so your boost controller can increase boost pressure above wastegate levels. System Includes:1/4" NPT Union T Fitting 2.5LB Bottle, and Bracket80-400psi CO2 Regulator 500psi Pressure Gauge 1/4" Nylon Tubing