I contacted technosquare last week and they said that they have done making ECU for 2004 g35. However, they've only done only for ECU type 19, R1 and R2.
Now my question is that how am I suppose to know which ECU I have without taking off the ECU? I looked at the ECU removal instructions at tehcnosquare website, but I still couldn't do it. Is there any other way to know what type of ECU I have without removing the ECU?
I have a 04 g35 coupe.

Thanks