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8409.91.50.10

Parts suitable for use solely or principally with the engines of heading 8407 or 8408 / Connecting rods

Classification path

  1. Parts suitable for use solely or principally with the engines of heading 8407 or 8408
  2. Other
  3. Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)
  4. Other
  5. To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704
  6. Other
  7. Connecting rods

Rates of duty

General (MFN)
2.5%
Column 2Cuba, North Korea, Russia, Belarus
35%
Unit of quantity
No., kg

Trade agreement rates

FreeGSP (lapsed since Dec 31, 2020), U.S.-Australia FTA, B, U.S.-Bahrain FTA, U.S.-Chile FTA, U.S.-Colombia TPA, AGOA (authorized through Dec 31, 2026), E, U.S.-Israel FTA, U.S.-Jordan FTA, U.S.-Korea FTA, U.S.-Morocco FTA, U.S.-Oman FTA, CAFTA-DR, U.S.-Panama TPA, U.S.-Peru TPA, USMCA, U.S.-Singapore FTA

Related lines in heading 8409

About heading 8409

Parts suitable for use solely or principally with the engines of heading 8407 or 8408

Heading 8409 covers parts made only or mainly for the engines of heading 8407 (spark-ignition) or heading 8408 (diesel). It splits first by engine type: 8409.10 for aircraft engine parts, 8409.91 for spark-ignition engine parts, and 8409.99 for all other engine parts, mostly diesel. The lines below that depend on the end use (vehicles of headings 8701 to 8704, marine propulsion engines, or other) and on whether the part is a rough cast-iron casting or a finished part such as a connecting rod.

Full guide to heading 8409

Products in this heading

  • Pistons, piston rings and piston pins for car and truck engines
  • Aluminum cylinder heads for spark-ignition vehicle engines
  • Connecting rods for gasoline or diesel engines
  • Engine valves, valve guides and valve seats
  • Carburetors and throttle body assemblies
  • Intake and exhaust manifolds
  • Rough cast-iron engine blocks and heads not advanced beyond cleaning
  • Parts for aircraft piston engines

Frequently asked questions

What is the HTS code for connecting rods for car engines?

Connecting rods for spark-ignition engines to be installed in vehicles of headings 8701 to 8704 are 8409.91.50.10, with a general (MFN) rate of 2.5%. For diesel engines in the same vehicles, use 8409.99.91.10, also 2.5%.

What is the duty on aluminum cylinder heads for vehicles?

Aluminum cylinder heads for spark-ignition engines installed in vehicles of headings 8701 to 8704 are classified in 8409.91.30.00 at a general (MFN) rate of 2.5%. The same part for other engines falls in 8409.99, where the rate depends on the end-use line.

How do I classify parts for aircraft engines?

Parts suitable for use solely or principally with aircraft engines of heading 8407 or 8408 go in 8409.10. Parts for use in civil aircraft are 8409.10.00.40 at a general (MFN) rate of Free, and other aircraft engine parts are 8409.10.00.80, also Free.

Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.

HTS 8409.91.50.10: Parts suitable for use solely or principally with the engin..., 2.5% duty | HTSBase