It's actually very common for mechanical boost gauge's to be "off" a little bit. Doesn't mean the boost gauge is bad, just means that the calibration of the needle is off a little bit. I've actually seen many instances where it'll be slightly off on a brand new boost gauge. (There are countless threads about this happening on other forums) The simple solution is just to factor in how off it is when you're reading it to know what your actually boost pressure is. But in all honestly i'm not really concerned about it. I don't really have alot of power mods done to my car and it never sees a track. I am mostly doing the boost gauge for aesthetic purposes. I never quite understood why the SRT-4 came factory with a boost gauge but an upper-echelon model like the SRT-6 lacked it. I wanted the car to look like it came factory with a boost gauge which is why I sourced an OEM SRT-4 boost gauge. I like that the gauge face is silver (it matches the interior trim/center console) and has the "SRT" logo on it. I am going to be mounting it somewhere that will look like it came from the factory with it so stay tuned for that. To my knowledge no-one has mounted a gauge where it'll be going.

I should also note that the boost gauge was given to me for free which is why i'm not too concerned by it being off....lol.

Thanks Les!