OK, let's hypothesize that the EPA no longer exists and emissions tests are a thing of the past. Or, I am going to use my M3 "for offroad use only". More background info: 08/95 M3 with CAI, euro HFM and exhaust modifications, and your HFM chip (specifically the one you burned for Nick G).
Now, I have been told that removing the cats from the M3 could result in a significant horsepower gain due to much reduced backpressure, particularly when combined with headers and new cams. Let's say though that I were to just remove the cats and replace them with bolt-in straight pipes (well, slightly bent to fit the exhaust system).
What DME problems would this raise for my OBDI M3? The O2 sensor is in the cat, so that would be an issue, correct? I read your adaptation FAQ, is that for both OBDI and OBDII cars? Could the DME be modified to account for the new straight pipes and thus yield a healthy HP gain (or do you think that headers must be done simultaneously for any real gain)?
Specifically, could you do the reprogramming? OR, could I do it with the DME editor and your guidance? I have access to an EPROM programmer.
TIA for any help.