The JET C.A.G.S. Skip Shift Eliminator is an OBDII compatible unit. C.A.G.S. means ?Computer Aided Gear Selector?. JET?s engineers have created the Skip Shift Eliminators to omit the computer aided gear selector feature in 1st to 4th gear on advanced 6 speed transmissions. Please, keep in mind that the installed product cannot be returned.