In mid-2007, Hornish drove Penske's No. 27 Dodge Charger in an ARCA Re/Max Series race at Michigan International Speedway. Starting in the pole position, he led the first 29 laps of the race before being passed by eventual winner Erik Darnell and finishing second. After the race, he called the transition to stock cars a "challenge": "I'm a student at this, still trying to learn as much as I can. A lot of people have asked me what the toughest transition is, coming over here from the IndyCars and doing these stock car races, and really it's the fact I don't get much practice time."