Harmonized Tariff Schedule of the United States · HTS code · HS 8409.91

8409.91.10

8409.91.10: Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery

Petrol engine parts

Not declarable on its own: use one of its 3 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026

  1. 8409 Parts suitable for use solely or principally with the engines of heading 8407 or 8408:
  2. Other:
  3. 8409.91 Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines):
  4. 8409.91.10 Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery

What you pay

Importing into USA

Customs duty Free standard rate depends on the country of origin
Additional duties and charges 8 additional measures
VAT no federal VAT; a Merchandise Processing Fee of 0.3464 % is charged on formal entries
Duty calculatorCalculate duty and taxes →

US additional duties of HTS chapter 99 in force on 22 October 2026 are included (Section 301, 232, 338 and 201). IEEPA duties are no longer collected after the Supreme Court ruling of February 2026. Conditional exemptions (US content, end use, metal share) are not computed: check the provision.

Additional duties and import rules

Charges on top of the customs duty, and rules the goods must meet at the border.

Additional duties and charges 8

  • Additional dutySection 232 — Medium- and heavy-duty vehicles, buses and parts 25%
    Applies to goods from
    all countries
    In force
    from 1 November 2025
    Legal act
    HTSUS 9903.74.08
  • Additional dutySection 301 — China — technology transfer, IP and innovation (2018 actions and 2024 four-year review) 25%
    Applies to goods from
    China
    In force
    from 24 September 2018
    Legal act
    HTSUS 9903.88.03
  • Additional dutySection 232 — Passenger vehicles, light trucks and parts 25%
    Applies to goods from
    all countries except Japan, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, South Korea, Taiwan
    In force
    from 3 May 2025
    Legal act
    HTSUS 9903.94.05
  • Additional dutySection 232 — Passenger vehicles, light trucks and parts 10%
    Applies to goods from
    United Kingdom
    In force
    from 30 June 2025
    Legal act
    HTSUS 9903.94.32
  • Additional dutySection 232 — Passenger vehicles, light trucks and parts 15%
    Applies to goods from
    Japan
    In force
    from 16 September 2025
    Legal act
    HTSUS 9903.94.43
  • Additional dutySection 232 — Passenger vehicles, light trucks and parts 15%
    Applies to goods from
    Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia and 19 more
    In force
    from 25 September 2025
    Legal act
    HTSUS 9903.94.53
  • Additional dutySection 232 — Passenger vehicles, light trucks and parts 15%
    Applies to goods from
    South Korea
    In force
    from 4 December 2025
    Legal act
    HTSUS 9903.94.63
  • Additional dutySection 232 — Passenger vehicles, light trucks and parts 15%
    Applies to goods from
    Taiwan
    In force
    from 1 May 2026
    Legal act
    HTSUS 9903.94.67

Subdivisions

  1. 8409.91.10 Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery Free
  2. 8409.91.10.40 For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704 kg
  3. 8409.91.10.60 For marine propulsion engines kg
  4. 8409.91.10.80 Other kg

Same subheading in other tariffs

8409.91 Suitable for use solely or principally with spark-ignition internal combustion piston engines

UK 2% Third-country duty 13 tariff lines EU 2.7% Third-country duty 1 tariff line Türkiye 2.7% Third-country duty 9 tariff lines Canada Free Third-country duty 3 tariff lines Mexico Free – 5% Third-country duty 19 tariff lines · average 0.5% Brazil Free – 16% Third-country duty 12 tariff lines · average 14.7% Argentina Free – 16% Third-country duty 15 tariff lines · average 14.9% Peru Free Third-country duty 10 tariff lines New Zealand Free – 5% Third-country duty 24 tariff lines · average 3.3% Japan Free Third-country duty 2 tariff lines Taiwan Free – 15% Third-country duty 13 tariff lines · average 8% GCC 5% Third-country duty 6 tariff lines Switzerland Free Third-country duty 1 tariff line Norway Free Third-country duty 2 tariff lines North Macedonia 8% Third-country duty 1 tariff line Nigeria 10% Third-country duty 1 tariff line

USA lines: 8409.91

Binding rulings for similar goods

Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.

  • H100675 U.S. CBP 17 August 2016 · 8409.91.10

    Request for Reconsideration of New York Ruling Letter N073512; Classification of cast iron ring carriers, also known as inserts, for use in spark-ignition engine pistons

Legal notes

Additional notes

1. For the purposes of subheadings 840710 and 840910, the expression ‘aircraft engines’ shall apply only to engines designed for fitting with an airscrew or rotor.

2. Subheading 84717030 shall also apply to CD-ROM drives, being storage units for automatic data-processing machines, which consist of drive units designed for retrieving the signals from CD-ROMs, audio CDs and photo CDs and equipped with a jack for earphones, a volume-control button or a start/stop button.

Chapter notes: Chapter 84 →

HTS code 8409.91.10 is a line of the Harmonized Tariff Schedule of the United States under HS subheading 8409.91 (suitable for use solely or principally with spark-ignition internal combustion…).

The general duty is free.

3 statistical sub-lines below it are used in the declaration.

For the same subheading, the UK duty is 2%, the EU duty is 2.7%, the Türkiye duty is 2.7%, the Canada duty is free, the Mexico duty is 0%–5%, the Brazil duty is 0%–16%, the Argentina duty is 0%–16%, the Peru duty is free, the New Zealand duty is 0%–5%, the Japan duty is free, the Taiwan duty is 0%–15%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is 8% and the Nigeria duty is 10%.

The United States imported goods of subheading 8409.91 worth US$7bn in 2024; the largest supplier was Mexico.

Questions and answers

What is the USA import duty for HTS code 8409.91.10?

The general duty in the Harmonized Tariff Schedule of the United States is free. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.

Where does the United States import these goods from?

For subheading 8409.91 as a whole, the largest supplier in 2024 was Mexico (US$3bn), followed by Japan.

Download as CSV Follow changes (RSS)