So when I accelerate from say 3500 rpm to 5000 I see about about 7 psi. After 5000 rpm it drops back to about 4 or 5 psi. I've checked my intercooler piping like 10 times and its ok. I've also checked the line that runs to the boost gauge and it seems ok ( I don't know how to check it when I'm under boost though). I also removed the air filter and boosted it to see if it was dirty, but I got the same results. What else should I try? My exhaust is HRC 2.5" dp to stock dp to 2.5" test pipe (no cat), resonator, to reactive muffler. Could the stock pipe from the resonator to the muffler cause this? I need to jack the car up and make sure of that pipes size. Any info on this would be great as I couldn't find anything in the search.

Thanks,

Chris


Oh, you don't like altezza's? Too bad, your gonna get a good look at mine.