I have a 04 Harley Deuce w/ EFI, just purchased a set of MSD 8.5MM super conductor spark plug wires. Would like to know if these wires would interfere with the ECM or any other of electronics on bike. Also connectors for coil end is different, stock coil end has a little stud in coil tower, connectors that came with wires are for std type. Would anyone sell these connectors or can I just reuse the ones from the stock wires.

 

Be carefull about changing from stock plugs or wires. It can affect the ION sensing (knock detection) for the ignition system and light a trouble light. It works off a resistance in the secondary ignition circuit and any change in the resistance to a point will affect it.

Take a look here https://www.hdforums.com/m_98758/tm.htm