E46Fanatics - View Single Post - Whats needed to swap from B25 to B30 intake?
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Old 04-15-2019, 05:25 PM   #12
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Join Date: Oct 2015
Location: Germany
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My Ride: 325i
Originally Posted by zfiles1701 View Post
And, with the B30 MAF will I need to tune my DME or will stock B25 run ok without a tune?

It’s mandatory to “tune” your dme, otherwise it’s going to run crazy lean

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