I believe I have seen pictures of this posted, use the search bar at the top of the page and type in oil pressure gauge installation. And this may be specific to the srt6 not sure but I think I remember it being on the left front of the engine near the water pump that is if you are facing the engine, in other words on the passenger side, The Forum member who posted the picture had to do some fancy Plumbing so that it would clear the drive belt.