I have an 04 WRX and my immediate plans for the car are/is.... a catback exhaust, downpipe, uppipe, boost actuater for about 16 psi, i already have a short ram and i installed ana ftermarket kartboy short shifter and im sticking with all this along with some suspension upgrades probably till my warrenty is up, now my question is, Which guages to get???

my mechanic wont install the boost actuater without a boost guage, so thats an obvious first. Next im figuring EGT??? lmk and will those 2 be fine? alott of people are telling me that air/fuel is very important ??? please help this newbie! ???????????

A boost gauge is a MUST...as is an EGT ...

A/F is a waste of time in a WRX unless you install a real wideband o2 sensor($$$)...eye candy...bling for the hunduah boyz.

Oil Pressure and/or temperature would be a good gauge to get. Oil temp is much more indicative of problems than water temp. A good oil pressure gage is also helpful.