i opened up my ecu`s today, one is a factory turbo a31 cefiro ecu and the other a turbo r32 skyline (i thought) i have opened 4 ecu all looking like the left hand ecu in the picture but the right side ecu in the picture has a totally different layout (no second board) any ideas on what it is i cant go off the casing as someone has changed it all the numbers are different the internal number is MEC-R531A
got me stumpped...