AEM 30-3255 Engine Position Module AEM30-3255 Very simple four-wire connection for easy installation (12V, ground, crank signal, and cam signal) Output signal amplitude and waveform stay constant at all RPM 24-tooth crank, 1-tooth cam pattern per engine cycle for accurate timing and easy set up (Pattern available in cam/crank sensor wizard in AEMPro/Tuner) Shock absorbing elastomer drive system eliminates potential for ignition timing deviation and protects the EPM from vibration