CAI's were brought to the market via use from racing . At WOT , such as on a dyno , yes , there should be an increase in HP over the stock box . If your planning on racing your jeep
. If not , all your gonna get is worse mpg's due to listening to the cool sound othe intake makes IMO . I doubt your gonna feel any differences .
TB spacers are a waste of money on anything other than TBI or carberated engines . MPI systems have injecters right above the combustion chambers , they would serve no pupose .
Buy a good Amsoil or K&N drop in , save your $$$