Recently changed the exhaust to a straight pipe setup. I noticed I'm targeting 20psi of boost but it looks like we're only consistently hitting about 17-18. Any ideas as to why? Maybe a boost leak ? It also says that I'm only using 80% throttle however I did have my foot down all the way. Otherwise, car feels pretty good. Pretty smooth, pretty quick. At the top of 4th gear we were going about 140mph.