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An ap1 cluster will plug right in to an ap2, there is hard wiring involved. The ap2 cluster has 2 connectors and the ap1 has 4. not to mention the clock and temperature.
This is my dyno of my old F20 vs. my new F22 with the same mods.
Mods: AEM V2 Intake, T1R Test Pipe, Spugen Single Exhaust and dyno tuned VAFC2