SPIRIT WAVES Devices have been installed on more than 20,000 diesel automobiles and none of them failed the annual overhaul inspection done by the Tokyo and Osaka Transportation Agancies.

Neither engine trouble nor low performance has been reported by the SPIRIT WAVES Device users.

*The graph and data before and after installation of SPIRIT WAVES Devicea in this WEB-page are published with the permission of the owners. *The reduction rate of each harmful ingredient is based on average data of SPIRIT WAVES Devices installed. The difference in reduction rate is dependent upon the condition and year of each automobile.