There are specific hardware
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/ software builds for different cars.
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.
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.
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For example, and RX7 Power-FC would never work on a MR2(3sGTE)
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If you are asking about Rev1/2/3 Power-FC's then there are three actual versions:
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1: Official Apexi Power FC
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- For Rev3's Only
2: Power FC Pro
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- Rev3 Only
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- an AP Engineering software tweek for drag racers
3: AP Engineering Power FC
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- Version specifically for Rev2's
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There are people in the USA making adapter looms to allow the Rev3 PFC to be plugged into American MR2's
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- perhaps this is where the confusion is?
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Paul