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Ej255 to EJ 257

1K views 3 replies 3 participants last post by  WTF Tuning 
#1 ·
I have a 2010 WRX and my engine broke. I have been looking for long-blocks but i just found EJ257. I got told that if i go from EJ255 to EJ257, I also have to change the ECU and wiring Harness. I want to know with someone with experience if that is true?
 
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