- 2015–2019 Factory-verified
only in: Stingray, Grand Sport, Z06; all trims: O; 2016, 2019: from GM order-guide copies (Corvette Action Center; 2019 also GM Authority)
EFY Factory-verified
Also described as Exterior vents, body-color
Documented applications
- 2020–2027 Factory-verified
only in: Stingray, Z06, E-Ray (2023: Stingray only, the 2023 guide prints it in the Stingray equipment and exterior tables on pp.15 and 53 and in none of the Z06 tables); the 2026–2027 lists add side vents, rockers, splitter and front/rear grille accents
This page aggregates every documented appearance of EFY in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.