We o-ring the heads in house, its not always necessary, but we always have had good luck doing it. If thats what you want and feel most comfortable having done with your truck thats your call and we will gladly make that happen for you. Not trying to get you to go one way or the other but at that power level its not much of a concern in all honesty.
Hellen Keller sent this?
Hellen Keller sent this?