Nitrous Express 15032 Water-Methanol Injection System for Diesel Stage 3 Engine Includes the latest technology and highest quality components available Provides increased perfomance with or without nitrous Cools incoming air charge and increases total octane effect of pump gas Allows you to run increased timing, resulting in increased power and torque When used with nitrous, the need for timing retard is greatly reduced or eliminated Includes the latest technology and highest quality components available Cools incoming air charge and increases total octane effect of pump gas Allows you to run increased timing, resulting in increased power and torque When used with nitrous, the need for timing retard is greatly reduced or eliminated