All drive shafts provided by our company are manufactured in the United States.
While they boast strength that is overwhelmingly superior to genuine parts, please be aware that they cannot be installed on vehicles intended for public road use, as they do not come with any "strength calculation documents" that comply with Japanese vehicle inspection regulations.
Furthermore, regarding installation on heavily tuned competition vehicles, please ensure you fully understand the methods of use and vehicle specifications before ordering and installing our drive shafts. (This includes the bolts used for installation, tightening torque, thorough retightening, etc.)
Please be aware that our company cannot be held responsible for any accidents or malfunctions that occur when installed on over-specced vehicles.