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Hello, I need some opinion about the use of CS Intake Manifold on a stock turbo car. I figured maybe this is a question a Mazdaspeed3 owners can answer. Since I am planning on cleaning the intake valve, I figured this is a good time to install CS injector seal and DM EGR block kit. Seeing that...

Hello, I am wondering if anyone has seen a boost oscillation problem such as this: (3rd gear log) There is no vacuum leak that I can see from smoke test, and it is definitely not a tune issue as a different tune map also result in basically the exact same problem. And both tunes was done...