vacuum meter and boost meter same lah...
jz that boost meter shows positive boost after 0hg.... while vacuum meter is showing negative boost (in most cases from 0 till 30hg)
thats why some people say boost meter also can act as vacuum meter.... but not so nice la... the needle stay below 0hg only.... coz no turbo spool ma... hahaha....
yaya..... any car can install vacuum meter.... worth it or not depend on u lor... during times where ur car has no problem, can use as cosmetic.... when got problem, it can show u approximately where gone wrong ma....
That day I saw a product on sale in some accesory shop, the FAKE BOV Sound Maker...
about the price of RM200. I remember Johnson Lam once written a thread on how to do that, some sort like connecting Car horn, sound...