45RFE 545RFE Transmission Line Pressure Booster Kit for Gas or Diesel Engines Fitment for Dodge Chrysler Dodge Chrysler Jeep Cummins 45RFE - 545RFE Line Pressure Booster. The simple direct plug in way to add performance to your transmission. The Line Pressure Booster modifies the pressure signal sent to the computer resulting in the computer raising the line pressure. The line booster has a 15-30 psi increase. Higher line pressure increases clutch holding power and torque capacity. Dodge Chrysler Transmission Line Pressure Booster Increased line pressure Increased clutch clamping force and torque capacity Installs on outside of transmission Easy plug and play installation NOTE: For 45RFE, 545RFE units only. Disclaimer - For Off-Road Use Only