Honestely newer tested . Test car had HKS F-con Pro and it had OEM coils and Drives/ driven By HKS ECU ( OEM set-up has OWN driver) Bosch dont need any kind of external driver. However bosch coils is very sensitive if there is something wrong in driver circuit or charge time is too long. That is good feature because coils dont get burnt easily.
We just added small extra feature on driver circuit wires.
Bolt on set is plug and play set .
AEM series 1 ( waste spark ) it does not work , Same ON AEM FIC. ( wrong or too long signal on start ) Rest of direct fire ecus works like a dream !
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