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Old 10-26-2012, 07:14 AM   #5
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Join Date: Sep 2012
Location: Old Greg's Cavern
Posts: 12,603
My Ride: '13 128i, '04 330Ci
Pretty sure a swap from an M52 2.5L to M54 3L you have to swap out every single part attached to the engine. They exhaust/intake is bigger on the 3L and the DME is newer. Also there is the drive by wire thing. I think you can just adapt that, though.
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