AEM Water / Methanol Injection Controller Kit V3 Pro - 4.3L
Dispatched Tuesday, May 6, 2025

Water / Methanol Injection Pro Kit
- Cost effective way to improve performances
- Better engine reliability
- Lowers operating temperatures
- Kit specially designed for boost pressures over 1.5 bar
- Kit contents : multi-input control unit, pump, injector, 4.3L tank and installation hardware
- AEM part no. : 30-3350
- Installation manual
AEM Water / Methanol kit Description
Injecting water or methanol is an easy, quick and cost-effective way to improve the performance and reliability of your turbo or supercharged engine. The principle function of a water / methanol injection kit is very simple : an injector sprays water in the intake, in the form of a very fine mist. The sprayed water instantly vaporizes in the intake : it is this change of state of the water (liquid state to gaseous state) which absorbs the heat of the air, and reduces its temperature by several tens of degrees.
Water / Methanol Injection Advantages
- The intake air is cooler and denser, allowing boost and ignition timing to be increased for better performance (without the need to increase the fuel's octane). AEM announces gains of up to 20% more power.
- Knock is repelled, significantly improving the reliability of the engine.
- Reduces exhaust gas temperature (EGT).
- Descaling: the vaporization of water acts as a "steam cleaner", eliminating carbon deposits for better performance. This is particularly significant if your engine is equipped with an exhaust gas recycling system (EGR).
Note that no water particles will reach the cylinders, as the water is vaporized instantly. Methanol provides the same benefits as water in this type of application, with even greater efficiency. You can, therefore, use pure water (preferably demineralized, or at least filtered), or a mixture of both up to 50% methanol concentration. For safety reasons, methanol being a highly flammable chemical, do not use greater than 50% methanol concentrations.
Injector / nozzle location requirements :
- The nozzle must be mounted above the tank (failure to do so may lead to fluid leaking or siphoning)
- The nozzle must be installed before the throttle butterfly
- Nozzle should also be mounted after the MAF sensor, if present, and after any intercoolers
Water / Methanol Injection Pro kit Components
- Multi-input control unit* and electrical harness, enabling the kit to be installed both high compression naturally aspirated vehicles (NA) using MAF/IDC settings and on ultra-high boost vehicles (above 1.5 bar boost) using an external MAP sensor
- Robust, reliable and quiet high-pressure water pump
- Forged aluminium injector, supplied with 3 nozzles in various shapes to change flow rate (please check installation manual to determine the flow that suits your needs)
- 4.3L tank, compact design with anti-surge, equipped with a level probe (the information of which is sent to the control unit)
- Fitting accessories, hoses, bolts, etc...
* Multi-input controller : 0-5V/MAF Frequency or Voltage/Duty Cycle/Ext MAP.
Note : This updated version of the kit uses the new (V3) injector design for both faster cooling and reduced fluid consumption.
Characteristics
Manufacturer | AEM |
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Behind the first "plug & play", programmable ECU in the 90's, the American company AEM is reknown for its high performance electronical parts. From adjustable ECUs to all sorts of gauges, wideband kits, water and methanol injection kits, dataloggers and fuel pumps, AEM offer the best solutions for the most highly tuned vehicles.