What are the units used on the factory boost gauge? It doesn't look like psi or bar....

I just had the SPT Catback installed yesterday and am experiencing the same thing on my 05. Before the catback I was completely stock and used to hit ~.1 MPa.lethiathan said:while we are on the subject of .09 My 06 was running at full .1 i just installed the spt intake and cat back exhaust. now i am only running at .09. The butt dyno says its slower too. I donno maybe that is psychosomatic. how hard is it to cause leaks while installing the exhaust?