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Re: K30 Downgrade to Cummins Project
No, inches past the frame rail it goes to 4” all the way back. My theory was the outlet in the turbo is smaller than 4” so going this route isn’t a bottle neck. Then as the temp cools the velocity of the gasses slows so I stepped it to 4” to keep back pressure down, with 5x12s and the he351 I’ve yet to get over 1100 degrees trying to make it run hot
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