Enge, Bell, Barron, Taylor top Panther test list. Panther Racing, the most successful team in Indy Racing League history with 13 IndyCar Series wins, 6 Infiniti Pro Series victories and two overall IRL driver's titles, has begun its search to replace Sam Hornish Jr in the #4 Pennzoil Dallara-Chevrolet next year as well as auditioning candidates