(d)
(d) Engine configuration (e.g., L6, V8, etc.).
Source
40 CFR § 205.55-2
Scoping language
(1) Prior to distribution in commerce of vehicles of a specific configuration, the first manufactures of such vehicles must verify such configurations in accordance with the requirements of this subpart.
(2) [Reserved]
(3) At any time following receipt of notice under this section with respect to a configuration, the Administrator may require that the manufacturer ship test vehicles to the EPA test facility in order for the Administrator to perform the tests required for production verification.