I have an 03' WRX and I'm having boost issues where I constantly get surge in 3rd, 4th and 5th gears. I tried swapping out factory boost control solenoids and it didn't seem to help, so I was thinking of buying the Perrin MBC and setting it for stock boost levels (or maybe 16 lbs at absolute most). I am running stock EM, have a P&P TD-04, 3 inch TBE (catless) and a K&N panel. Would this be an advisable thing to do? I want to keep at stockish boost levels but get rid of the surging and maybe pick up a little earlier spool.