I have a stock 13 wrx and lately I have been noticing that my spt gauge has only been peaking at 10 and holding steady. Tonight when I did a wot pull my car peaked at 10 then dropped to 9, but it was 4 degrees out. Is it normal for boost to be lower when it's freezing out. And isn't stock peak 14.5 then taper down to 12.5. That's what my car used to hit.