26 C.F.R. § 48.4062(a)-1 Specific parts or accessories.
Title 26 - Internal Revenue
Spark plugs, storage batteries, leaf springs, coils, timers, and tire chains, which are suitable for use on or in connection with, or as component parts of, automobile trucks, other automobiles, tractors, or other vehicles enumerated in section 4061(a), are considered parts of, or accessories for, such articles whether or not primarily designed or adapted for such use.
Title 26: Internal Revenue
PART 48—MANUFACTURERS AND RETAILERS EXCISE TAXES
Subpart H—Motor Vehicles, Tires, Tubes, Tread Rubber, and Taxable Fuel
motor vehicles
§ 48.4062(a)-1 Specific parts or accessories.
