I'd untape the harness to keep things clean and tight. The USDM motors work just as well as the JDM ones, plus you won't be able to use the JDM air mix door motor because it's reversed (unless you make an adapter like Russ to unreverse it). The only exception might be the intake door motor. The USDM one only has 4 wires coming from the connector but the JDM one has 6. The harness should plug in and work fine though.
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