Installing a trailer hitch will not void the warranty on your 2010 Kia Forte. There is a federal law that states in part that unless the installed item is directly responsible for a failure then the warranty cannot be voided.
With that said, the Curt Trailer Hitch, # C11019, is specifically designed for the Koup model Kia Forte. I have included a link to the installation instructions below. This hitch comes with a ball mount, hitch pin and clip. All you would need for towing is a ball,... view full answer...