Installation should be performed by certified professionals using the correct hardware and torque specifications. Use the O.E.M. torque specification for the vehicle with the appropriate lug nut or lug bolt. If the O.E.M. specification is unavailable, refer to the torque chart in the installation guide. Improper installation may be dangerous and could void your warranty. Read the complete installation guide before attempting to install the wheels yourself. If you have any questions or concerns regarding the installation process, the correct type of fastener, or the proper torque specification for your vehicle, do not install the wheels.