Hondata

I was wondering if the reflash for the 06 SI has been tested with a high flow cat (and intake) or if there are estimated gains. It seems that the largest gain with this reflash is achieved with an intake and a race header. I do not want to eliminate the catalytic converter but I wonder if the stock ...

With a new ECU, the dealer has to configure immobilizer, key, and ECU for the car to work? I was considering (now kind of wondering why) buying a 2nd ECU and getting the Hondata reflash done on this, while keeping my stock computer stock. In reliant's case, Honda can set up immobilizer, key, and ECU ...

I have another related question since you guys are the ECU experts. Are the 2007 ECUs for the SI (A11, A12 that I know of) the same computer? Are they backwards compatible with the 2006 SI (A03, A04, A05)?

Thanks

I have seen this ECU for sale. On your Hondata reflash information for 2006 Civic SI it states the reflash is compatible with RRB-A04 and A05. I assume it will not work with RRB-A03?