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      01-24-2007, 05:43 PM   #37
jasper
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Drives: 2002 325i
Join Date: Jan 2006
Location: San Ramon, CA

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My understanding is that it would work if you put a 3-stage manifold on a car that came with the single stage version; however, nobody has successfully modified the software on the ECU but there shouldn't be a problem if you swap the ECU with one from a 330i, assuming that doesn't cause other problems...

my understanding is that the 328i only has the single stage intake