Hi I bought my WRX used and the EGT sensor was missing with a bolt screwed in its place. My turbo seems to spool up abnormally to fast also, at like 2500rpm. I know that the original owner was doing minor mods because when I got the car the 3/16” mod was already done. So anyway to tell? I’m going to be upgrading my exhaust soon and it seems like if the UP is already gutted then it’s not even worth changing it. Thanks.