Running into a similar situation. 02-04 Kpro, 02-04 harness, 06' Accord trans, Del Sol cluster. The Accord trans is high frequency like your 08 Si so it will have to be converted like Brotato said. My issue is 05+ trans use 5v VSS power while 02-04 use 12v. Most say repin the plug to match the sensor but that means 12v power to the 5v sensor and yet I haven't read about a single sensor failure doing it this way. Simply, does it matter or not?
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