Originally Posted by
bassboy3313
Hey guys. Coming over from the e21 section. I am currently searching for the cleanest way to put an electric speedometer into my e21 gauge cluster do to having an e30 m20 turbo swap and medium case diff swap. I was curious on what size diameter the e28 speedometer is? The e30 gauges are smaller than the e21 which doesn't look right to me. So, I am hoping that the e28 gauge is the correct size I need. If someone could measure the diameter of their speedometer for me that would be awesome. Thanks!
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