{ "summary": "The United States tariff splits HS 8409.91 (other: Suitable for use solely or principally with spark-ignition internal combustion piston engines) into 11 national lines: 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), 8409.91.10.60 (for marine propulsion engines), 8409.91.10.80 (other), 8409.91.30.00 (aluminum cylinder heads) and 7 others.", "updatedAt": "2026-10-09", "facts": [ { "label": "HS subheading", "value": "8409.91", "source": null, "url": "https://border.bot/hs-codes/840991" }, { "label": "National lines", "value": "11", "source": null }, { "label": "Tariff", "value": "United States", "source": "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false", "url": "https://border.bot/countries/united-states" }, { "label": "Chapter", "value": "84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof", "source": null } ], "faq": [ { "question": "How many national tariff lines does the United States tariff have under HS 8409.91?", "answer": "The United States tariff splits HS 8409.91 (other: Suitable for use solely or principally with spark-ignition internal combustion piston engines) into 11 national lines: 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), 8409.91.10.60 (for marine propulsion engines), 8409.91.10.80 (other), 8409.91.30.00 (aluminum cylinder heads) and 7 others." } ], "sections": [ { "id": "covers", "title": "United States lines under 8409.91", "text": [ "The United States tariff splits HS 8409.91 (other: Suitable for use solely or principally with spark-ignition internal combustion piston engines) into 11 national lines: 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), 8409.91.10.60 (for marine propulsion engines), 8409.91.10.80 (other), 8409.91.30.00 (aluminum cylinder heads) and 7 others." ] }, { "id": "other-countries", "title": "In other countries", "text": [ "No other national tariff on border.bot has live lines under 8409.91 yet." ] }, { "id": "sources", "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." ] } ], "data": { "type": "country-subheading", "country": { "code": "US", "name": "United States", "slug": "united-states" }, "schedule": { "code": "US", "name": "United States", "slug": "united-states" }, "borrowed": false, "localTaxes": [], "localDeminimis": [], "ratesLive": true, "provenance": [ { "dataset": "US:hs", "country": "US", "kind": "hs", "seq": 1, "version": "2026HTSRev21", "liveAt": "2026-10-09T21:15:50.043Z", "origin": "source", "sourceUrls": [ "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false" ] }, { "dataset": "US:rates", "country": "US", "kind": "rates", "seq": 1, "version": "2026HTSRev21", "liveAt": "2026-10-09T21:15:36.287Z", "origin": "source", "sourceUrls": [ "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false" ] }, { "dataset": "US:programmes", "country": "US", "kind": "programmes", "seq": 1, "version": "2026HTSRev21", "liveAt": "2026-10-09T21:15:58.040Z", "origin": "source", "sourceUrls": [ "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false" ] } ], "dateModified": "2026-10-09T21:15:58.040Z", "chapter": { "code": "84", "description": "Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof" }, "heading": { "code": "8409", "description": "Parts suitable for use solely or principally with the engines of heading 8407 or 8408" }, "subheading": { "code": "840991", "description": "Other: Suitable for use solely or principally with spark-ignition internal combustion piston engines" }, "lines": [ { "code": "8409911040", "description": "For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704", "levels": [ "Other", "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", "For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704" ], "english": null, "keywords": [], "lang": "en", "general": { "code": "84099110", "dutyText": "Free", "startDate": null, "endDate": null, "unit": null }, "preferences": [], "measures": [], "restrictions": [] }, { "code": "8409911060", "description": "For marine propulsion engines", "levels": [ "Other", "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", "For marine propulsion engines" ], "english": null, "keywords": [], "lang": "en", "general": { "code": "84099110", "dutyText": "Free", "startDate": null, "endDate": null, "unit": null }, "preferences": [], "measures": [], "restrictions": [] }, { "code": "8409911080", "description": "Other", "levels": [ "Other", "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", "Other" ], "english": null, "keywords": [], "lang": "en", "general": { "code": "84099110", "dutyText": "Free", "startDate": null, "endDate": null, "unit": null }, "preferences": [], "measures": [], "restrictions": [] }, { "code": "8409913000", "description": "Aluminum cylinder heads", "levels": [ "Other", "Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)", "Other", "To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or 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Trade Agreement Implementation Act" }, { "code": "MA", "label": "United States-Morocco Free Trade Agreement Implementation Act" }, { "code": "OM", "label": "United States-Oman Free Trade Agreement Implementation Act" }, { "code": "P", "label": "Dominican Republic-Central America-United States Free Trade Agreement" }, { "code": "PA", "label": "United States-Panama Trade Promotion Agreement Implementation Act" }, { "code": "PE", "label": "United States-Peru Trade Promotion Agreement Implementation Act" }, { "code": "S", "label": "United States-Mexico-Canada Agreement" }, { "code": "SG", "label": "United States-Singapore Free Trade Agreement" } ] } ], "measures": [], "restrictions": [] }, { "code": "8409915010", "description": "Connecting rods", "levels": [ "Other", "Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)", "Other", "To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704", "Other", "Connecting rods" ], "english": null, "keywords": [], "lang": "en", "general": { "code": "84099150", "dutyText": "2.5%", "startDate": null, "endDate": null, "unit": null }, "preferences": [ { "dutyText": "Free", "origins": [ { "code": "A*", "label": "a group of origins (origin group A*)" }, { "code": "AU", "label": "United States-Australia Free Trade Agreement" }, { "code": "BH", "label": "United States-Bahrain Free Trade Agreement Implementation Act" }, { "code": "CL", "label": "United States-Chile Free Trade Agreement" }, { "code": "CO", "label": "United States-Colombia Trade Promotion Agreement Implementation Act" }, { "code": "D", "label": "African Growth and Opportunity Act" }, { "code": "E", "label": "Caribbean Basin Economic Recovery Act" }, { "code": "IL", "label": "United States-Israel Free Trade Area" }, { "code": "JO", "label": "United States-Jordan Free Trade Area Implementation Act" }, { "code": "KR", "label": "United States-Korea Free Trade Agreement Implementation Act" }, { "code": "MA", "label": "United States-Morocco Free Trade Agreement Implementation Act" }, { "code": "OM", "label": "United States-Oman Free Trade Agreement Implementation Act" }, { "code": "P", "label": "Dominican Republic-Central America-United States Free Trade Agreement" }, { "code": "PA", "label": "United States-Panama Trade Promotion Agreement Implementation Act" }, { "code": "PE", "label": "United States-Peru Trade Promotion Agreement Implementation Act" }, { "code": "S", "label": "United States-Mexico-Canada Agreement" }, { "code": "SG", "label": "United States-Singapore Free Trade Agreement" } ] } ], "measures": [], "restrictions": [] }, { "code": "8409915081", "description": "Steel forgings", "levels": [ "Other", "Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)", "Other", "To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704", "Other", "Steel forgings" ], "english": null, "keywords": [], "lang": "en", "general": { "code": "84099150", "dutyText": "2.5%", "startDate": null, "endDate": null, "unit": null }, "preferences": [ { "dutyText": "Free", "origins": [ { "code": "A*", "label": "a group of origins (origin group A*)" }, { "code": "AU", "label": "United States-Australia Free Trade Agreement" }, { "code": "BH", "label": "United States-Bahrain Free Trade Agreement Implementation Act" }, { "code": "CL", "label": "United States-Chile Free Trade Agreement" }, { "code": "CO", "label": "United States-Colombia Trade Promotion Agreement Implementation Act" }, { "code": "D", "label": "African Growth and Opportunity Act" }, { "code": "E", "label": "Caribbean Basin Economic Recovery Act" }, { "code": "IL", "label": "United States-Israel Free Trade Area" }, { "code": "JO", "label": "United States-Jordan Free Trade Area Implementation Act" }, { "code": "KR", "label": "United States-Korea Free Trade Agreement Implementation Act" }, { "code": "MA", "label": "United States-Morocco Free Trade Agreement Implementation Act" }, { "code": "OM", "label": "United States-Oman Free Trade Agreement Implementation Act" }, { "code": "P", "label": "Dominican Republic-Central America-United States Free Trade Agreement" }, { "code": "PA", "label": "United States-Panama Trade Promotion Agreement Implementation Act" }, { "code": "PE", "label": "United States-Peru Trade Promotion Agreement Implementation Act" }, { "code": "S", "label": "United States-Mexico-Canada Agreement" }, { "code": "SG", "label": "United States-Singapore Free Trade Agreement" } ] } ], "measures": [], "restrictions": [] }, { "code": "8409915085", "description": "Other", "levels": [ "Other", "Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)", "Other", "To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 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"code": "P", "label": "Dominican Republic-Central America-United States Free Trade Agreement" }, { "code": "PA", "label": "United States-Panama Trade Promotion Agreement Implementation Act" }, { "code": "PE", "label": "United States-Peru Trade Promotion Agreement Implementation Act" }, { "code": "S", "label": "United States-Mexico-Canada Agreement" }, { "code": "SG", "label": "United States-Singapore Free Trade Agreement" } ] } ], "measures": [], "restrictions": [] }, { "code": "8409919910", "description": "Connecting rods", "levels": [ "Other", "Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)", "Other", "Other", "Connecting rods" ], "english": null, "keywords": [], "lang": "en", "general": { "code": "84099199", "dutyText": "2.5%", "startDate": null, "endDate": null, "unit": null }, "preferences": [ { "dutyText": "Free", "origins": [ { "code": "A*", "label": "a group of origins (origin group A*)" }, { "code": 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"label": "United States-Panama Trade Promotion Agreement Implementation Act" }, { "code": "PE", "label": "United States-Peru Trade Promotion Agreement Implementation Act" }, { "code": "S", "label": "United States-Mexico-Canada Agreement" }, { "code": "SG", "label": "United States-Singapore Free Trade Agreement" } ] } ], "measures": [], "restrictions": [] }, { "code": "8409919990", "description": "Other", "levels": [ "Other", "Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)", "Other", "Other", "Other" ], "english": null, "keywords": [], "lang": "en", "general": { "code": "84099199", "dutyText": "2.5%", "startDate": null, "endDate": null, "unit": null }, "preferences": [ { "dutyText": "Free", "origins": [ { "code": "A*", "label": "a group of origins (origin group A*)" }, { "code": "AU", "label": "United States-Australia Free Trade Agreement" }, { "code": "BH", "label": "United States-Bahrain Free Trade Agreement 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