{ "summary": "The United States tariff splits HS 8421.32 (filtering or purifying machinery and apparatus for gases: Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines) into 1 national line: 8421.32.00.00 (catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines). Every United States line under 8421.32 is free of general (MFN) duty.", "updatedAt": "2026-10-09", "facts": [ { "label": "HS subheading", "value": "8421.32", "source": null, "url": "https://border.bot/hs-codes/842132" }, { "label": "Duty (MFN)", "value": "Free", "source": "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false" }, { "label": "National lines", "value": "1", "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 8421.32?", "answer": "The United States tariff splits HS 8421.32 (filtering or purifying machinery and apparatus for gases: Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines) into 1 national line: 8421.32.00.00 (catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines)." }, { "question": "What is the duty on HS 8421.32 in the United States?", "answer": "Every United States line under 8421.32 is free of general (MFN) duty." } ], "sections": [ { "id": "covers", "title": "United States lines under 8421.32", "text": [ "The United States tariff splits HS 8421.32 (filtering or purifying machinery and apparatus for gases: Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines) into 1 national line: 8421.32.00.00 (catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines).", "Every United States line under 8421.32 is free of general (MFN) duty." ] }, { "id": "other-countries", "title": "In other countries", "text": [ "No other national tariff on border.bot has live lines under 8421.32 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. 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