Fuel/Ignition Controller Wiring Harnesses | AEM AEM F/IC harnesses include a bypass harness and 24" flying lead harness. Please click on the EMS Accessories link to find a USB comms cable. NOTE: F/IC units include a wiring harness. The harnesses listed here and on the purchase tab are for replacement only and are not necessary if you are purchasing a new F/IC. Universal Core & Accessory Wiring Harnesses | AEM AEM's Universal Core & Accessory Wiring Harnesses simplify the installation of an Infinity ECU on any 4-, 6- or 8-cylinder application with an Infinity-supported crank/cam timing configuration (please visit the Infinity Supported Applications page for a list of supported cam & crank timing strategies).