I have a '95 325is with an open 3.15. Im looking to upgrade but im not sure on fitments. From what car can i swap differentials from that would involve no modification. I have heard of problems with output flanges or something not matching up. So again im just wondering what can be easily swapped over to my car. I found a 3.45 from a 94 318 so maybe that will fit? If not how hard is it to swap over flanges. Any help is much appreciated.
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