The GT45 wouldn't fit in the limited space that's available in the M3. We are now trying the highly recommended Precision 8285. We have a mysterious 4,500rpm rev limiter with the ProEFI that comes and goes that we can't seem to track down. There is no on-board logger so we are trying to get some other software to work on our computer so we can look at the logs. However... we downloaded the software for $30 and that software doesn't seem to let us look at the logs. Help!! So we may switch back to the AEM again to try and get some dyno numbers out of this new turbo unless ProEFI can help us get through these issues.
Here's a picture of the new monster turbo We are told we should be able to see 1100rwhp with this bad boy.