| Tail Number / N-Number | N991MS |
| Manufacturer | STEPHAN MICHAEL |
| Model | RV-8 |
| Year Built | 2004 |
| Manufacturer's Serial Number | 81382 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | STEPHAN MICHAEL G |
| Street | 2745 GRAHAM ST |
| City | GRAND PRAIRIE |
| State | TX |
| Zip Code | 75050-4339 |
| Region | Southwestern |
| County | Dallas County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2004-11-15 |
| Certificate Issue Date | 2004-04-28 |
| Last Action Date | 2022-11-02 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 53353576 |
| Mode S Code Hex | ADD77E |