Japanese company HKS well known for its Superchargers have also developed a series of Spark Plugs for four-stroke engines. The current spark plugs are still under development and testing with the scope to release them in the market next year. For the time being the tech spec of the new plugs have not been announced. Our fellow journalist from Japan Seiji Uchihasi recently posted the news on his web site, www.jetter.jp and on Facebook.
