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For Subaru WRX�s utilizing the stock 0-5 volt output MAF sensor. Also works on STi�s. The Digital Variable Control unit proportionally injects more or less water-methanol according to input signals from the mass air flow sensor. More power over a wider range and better drivability is the result. 20% increases in Horsepower typical.
� Digital MAF referenced controller
� 150+ psi pump for the most in pressure and volume
� Bulkhead fitting required to tap into factory washer reservoir or factory trunk mounted intercooler sprayer reservoir
� 20 feet of tubing
� 2 nozzles to cover a wide range of horsepower
� All required hardware needed for installation
� WRX/STi specific instructions for ease of installation
*NOTE* It is recommended that a Solenoid Upgrade (#40060) be used in any application that utilizes a trunk mounted reservoir.