AEM 30-6905 Universal Programmable EMS-4 - Manual (Page 242)

Page 242 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
2Step Rev Limiter
Secondary rev limiters (2 step) are most commonly used in drag racing for consistent vehicle
launches. However, secondary rev limiters can also be used for full throttle shifting, anti-lag,
valet parking, etc.
There are many different ways to install and program a 2Step Rev Limiter with the AEM EMS.
Although any switch can be used, utilizing the factory clutch switch is most common. Most
vehicles use a pull to ground switch. This simple installation involves splicing a wire from the
clutch switch location to an available switch on the EMS, as shown below.