The 1998 Bosch Spark Plug Grand Prix Presented by Toyota was the fourth round of the 1998 CART FedEx Champ Car World Series season, in Nazareth, Pennsylvania. The race was won by Jimmy Vasser, his first win on an oval for nearly two years. Vasser won ahead of teammate and reigning champion Alex Zanardi, making it a 1-2 finish for Chip Ganassi Racing.