Ok, I have a question, Does this sound like something that a stock downpipe w/ big exhaust after that can cause. Ok, while the turbo is spooling it pulls hard, once I hit full boost, it really seems to fall off major. I thought with the T-Bird turbo that would be eliminated. The boost doesnt seem to creep or spike. Gauge stays pretty much constant. What else can cause this. If it was a leaky BOV, wouldnt the boost creep negatively? Let me know what to look for?