{
  "summary": "In the United States tariff, line 8409.91.10.80 covers suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines), 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. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 8409.91 in heading 84.09 (chapter 84).",
  "updatedAt": "2026-10-09",
  "facts": [
    {
      "label": "Tariff line",
      "value": "8409.91.10.80",
      "source": "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false"
    },
    {
      "label": "Covers",
      "value": "Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines), 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",
      "source": "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false"
    },
    {
      "label": "Duty (MFN)",
      "value": "Free",
      "source": "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false"
    },
    {
      "label": "Additional duties",
      "value": "None recorded",
      "source": null
    },
    {
      "label": "Restrictions",
      "value": "None recorded",
      "source": null
    },
    {
      "label": "Tariff",
      "value": "United States",
      "source": "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false",
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      "value": "8409.91",
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      "url": "https://border.bot/hs-codes/840991"
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  "faq": [
    {
      "question": "What does tariff line 8409.91.10.80 cover in the United States tariff?",
      "answer": "In the United States tariff, line 8409.91.10.80 covers suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines), 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."
    },
    {
      "question": "What is the general (MFN) duty on 8409.91.10.80 in the United States?",
      "answer": "Goods under this line enter free of general (MFN) duty. The rate is published on 8409.91.10."
    }
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  "sections": [
    {
      "id": "covers",
      "title": "What this line covers",
      "text": [
        "In the United States tariff, line 8409.91.10.80 covers suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines), 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.",
        "Its legal text is “Other”, read under “Other”, “Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)” and “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”."
      ]
    },
    {
      "id": "structure",
      "title": "How it is structured",
      "text": [
        "It falls under HS subheading 8409.91 in heading 84.09 (chapter 84). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff."
      ]
    },
    {
      "id": "duty",
      "title": "Duty",
      "text": [
        "Goods under this line enter free of general (MFN) duty.",
        "The rate is published on 8409.91.10."
      ]
    },
    {
      "id": "other-countries",
      "title": "In other countries",
      "text": [
        "No other national tariff on border.bot has live lines under 8409.91 yet."
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    {
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      "title": "Sources and updates",
      "text": [
        "The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.",
        "The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.",
        "The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.",
        "This page was last updated on 9 October 2026.",
        "Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling."
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    "chapter": {
      "code": "84",
      "description": "Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof"
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      "keywords": [],
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        "code": "84099110",
        "dutyText": "Free",
        "startDate": null,
        "endDate": null,
        "unit": null
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      "measures": [],
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      {
        "code": "8409919910",
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        "code": "8409919990",
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