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Old 01-08-2013, 02:53 PM   #16
Scooby Specialist
Member#: 321715
Join Date: May 2012
Chapter/Region: Tri-State
Location: Philly/SJ
03 Big 16G WRX


Is an 02 ECU plug and play with 04? My initial thought would be no. The flash block isn't even similar. The 03 and 04 ECU flash blocks are identical. I'm not an expert at this but this would be my initial question OP
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