Wiring Harnesses | AEM EMS-4 Wiring Harnesses. Patch/Extension Wiring Harnesses. 30 & 20 Amp Relay Wiring Kits. AQ-1 Data Logger Wiring Harnesses. Fuel/Ignition Controller AEM INFORMATION. Warranty/Return. Become a Dealer. Dealer Locator. About AEM Electronics. Contact Us. Career Opportunities. Sponsorship. New Products. 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).