HKS Co., Ltd. engages in the manufacture and sale of automobile aftermarket parts in Japan and internationally. It offers exhaust systems, turbochargers, suspensions, electronic parts, original goods, NGV parts, and others; race engines; and conversion kits for converting a gasoline vehicle into compressed natural gas and gasoline Bi-fuel vehicle. The company is also involved in developing and selling light sport aircraft engines; and contract and original equipment manufacturing business. HKS Co., Ltd. was founded in 1970 and is headquartered in Fujinomiya, Japan.