AEM Water Methanol Injection Solenoid K20Z Using a wideband air fuel controller Using a wideband air fuel controller during the tuning process allows you to monitor AFR and adjust tuning parameters to optimize them for maximum power and efficiency 08 Up Stock Reflashed ECUs – This module is the perfect add on for CD Carbon Dash owners who are sending channels to a CD Carbon Dash from an OBDII CAN stock ECU and want to add additional channels that are not available through the factory CAN stream High flow rating (3600 cc min @ 150 psi) AEM’s stainless steel Water Methanol Injection Solenoid (PN 30 3326) eliminates any chance of water methanol flow into the inlet when the WMI system is not engaged