HKS Co Ltd is a Japan-based company engaged in the design, development, and manufacturing of automobile parts including original exhaust systems and suspension, turbocharger, suspensions, electronic parts, and related parts are mainstream. In addition, the company is also involved in the CNG business, Bi-fuel business, LSA engine business and Contract and OEM business. In the CNG business, the company carries out the activity of converting the diesel engine into CNG engine.