Quote Originally Posted by Stephen Shaw View Post
The 03s (from what I've read) you can't just swap the pcm, I believe it's vin locked.

So if the bypass valve isn't needed, why is it there?

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You can tune 03's. That pcm works for that year only due to the transmission being that year only.

Solenoid is to dump boost if you stay in it too long, traction control or similar scenario.