PRP Internal Ignitor Bypass (Signal Converter) - Ford Coyote 5.0LThis box allows factory ECU to send an ignition fire signal to more powerful Smart coils with internal fire signals by converting the IGBT signal from the internal ECU MOSFET to a square 5v wave. If you are running your Coyote engine on a factory ECU (also includes the Haltech Plugin), it MUST have this box to operate the R35 coil kit. Failure to run it will result in fried ignition coils. IMPORTANT NOTE: As these coils have different windings to the
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PRP Internal Ignitor Bypass (Signal Converter) - Ford Coyote 5.0L