I recently purchased a 2002 WRX sedan with approx. 114k on the stock engine. I installed triple pillar gauges and have noticed that I'm only boosting a maximum of 6lbs. I have no CEL's but a definite lack in power. My vacuum gauge is reading correctly so I believe all my lines are intact. Should I look into replacing the turbo itself or are there other causes for this issue? I'm just looking for guidance and options, thank you.