1988 IndyCar season Drivers and constructors Drivers and constructors

| Team | Chassis | Engine | Tires | Drivers |
|---|---|---|---|---|
| GF Racing | March | Cosworth | G | José Romano |
| Indiana Carbon | March | Cosworth | G | Spike Gehlhausen |
| Mergard | March | Cosworth | G | Harry Sauce |
| Performers, Inc. | March | Cosworth | G | Tom Bigelow |