Complex sentence: He and Benny return to the garage, now long closed, he contact the owner of the Shelby Mustang, convinces him to lend them the car to race it in a multi-million dollar illegal road race--though the owner stipulates that Julia rides along.
Split into simpler sentences: He and Benny return to the garage, now long closed. He contacts the owner of the Shelby Mustang, convincing him to lend them the car to race it in a multi-million dollar illegal road race--though the owner stipulates that Julia rides along.