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I thought the V.2 was meant to have the 6K ECU in it? Is the Z4 better than the 6K ????????????????????
correct, STi V2 is 6K, STi RA V2 is 7K
I think the Z4 is a little safer the the Z5.
There probably isn't much difference between the Z4 and Z5, as there isn't between the 6K and 7K (V2 STi and STI RA) or the W6 and W9 (WRX and WRX RA).