Fits: 2017 Mclaren 540C

Our seat belt extenders / extensions are perfect for people who cannot otherwise buckle up with their seat belts existing factory length, including plus sized people, people with mobility issues or disabilities, firefighters, police officers, EMT workers, passengers in non emergency transportation vehicles and others. All of our extenders are E8 Certified, meet and/or exceed FMVSS regulations and are manufactured in a factory with a USDOT certification. This extender is our adjustable model, which will extend the factory installed seat belt in your vehicle between 9" and 24".