AEM Water Injection Kits for your WRX or STi is a  cost effective and user-friendly alternatives to very expensive water injection kits. The AEM Water Injection kits are a perfect way to reduce air inlet temps and increase charge density in boosted vehicles. These AEM kits allow the user to safely run higher boost pressures and suppress detonation allowing the utilization of more timing and boost. AEM's progressively controlled high-pressure pump draws water (or up to a 50% alcohol mixture) from the supplied tank (with integral fluid level sensor) to provide boost-dependant variable flow. Your water is fed into the intake system via interchangable nozzles for additional flow control.

An integrated system status light, which can be mounted on your dash, keeps you informed with easily identifiable error codes such as short circuit warnings, battery voltage problems, and low fluid alarms.