| Tail Number / N-Number | N158SR |
| Manufacturer | RALSTON SAMUEL SHERMAN |
| Model | RV-4 |
| Manufacturer's Serial Number | 630 |
| 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 | LYCOMING |
| Engine Model | 0-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Individual |
| Owner Name | RALSTON SAMUEL S |
| Street | PO BOX 778 |
| City | FRUITLAND |
| State | ID |
| Zip Code | 83619-0778 |
| Region | Northwest Mountain |
| County | Payette County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1988-09-16 |
| Certificate Issue Date | 2020-02-14 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-02-28 |
| Status | Valid Registration |
| Mode S Code | 50164607 |
| Mode S Code Hex | A0E987 |