# United States tariff line 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 > In the United States tariff, line 8409.91.10.40 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, for vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 8409.91 in heading 84.09 (chapter 84). Source: https://border.bot/countries/united-states/hs-codes/8409911040 Last updated: 9 October 2026 [Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 84](https://border.bot/countries/united-states/hs-codes/84) / [8409.91](https://border.bot/countries/united-states/hs-codes/840991) / [8409.91.10.40](https://border.bot/countries/united-states/hs-codes/8409911040) ## Key facts - Tariff line: 8409.91.10.40 - 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, for vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704 - Duty (MFN): Free - Additional duties: None recorded - Restrictions: None recorded - Tariff: [United States](https://border.bot/countries/united-states) - HS subheading: [8409.91](https://border.bot/hs-codes/840991) ## What this line covers In the United States tariff, line 8409.91.10.40 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, for vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704. Its legal text is “For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704”, 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”. ## How it is structured 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. - Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof - Heading 84.09: Parts suitable for use solely or principally with the engines of heading 8407 or 8408 - Subheading 8409.91: Other - Within the subheading: Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines) - Within the subheading: 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 - Line 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 ## Duty Goods under this line enter free of general (MFN) duty. The rate is published on 8409.91.10. ## In other countries No other national tariff on border.bot has live lines under 8409.91 yet. - [The Harmonized System text for 8409.91](https://border.bot/hs-codes/840991) ## Other lines under 8409.91 - [8409.91.10.60](https://border.bot/countries/united-states/hs-codes/8409911060) For marine propulsion engines - [8409.91.10.80](https://border.bot/countries/united-states/hs-codes/8409911080) Other - [8409.91.30.00](https://border.bot/countries/united-states/hs-codes/8409913000) Aluminum cylinder heads - [8409.91.50.10](https://border.bot/countries/united-states/hs-codes/8409915010) Connecting rods - [8409.91.50.81](https://border.bot/countries/united-states/hs-codes/8409915081) Steel forgings - [8409.91.50.85](https://border.bot/countries/united-states/hs-codes/8409915085) Other - [8409.91.92.10](https://border.bot/countries/united-states/hs-codes/8409919210) Connecting rods - [8409.91.92.90](https://border.bot/countries/united-states/hs-codes/8409919290) Other - [8409.91.99.10](https://border.bot/countries/united-states/hs-codes/8409919910) Connecting rods - [8409.91.99.90](https://border.bot/countries/united-states/hs-codes/8409919990) Other - Previous line: [8409.10.00.80](https://border.bot/countries/united-states/hs-codes/8409100080) Other - Next line: [8409.91.10.60](https://border.bot/countries/united-states/hs-codes/8409911060) For marine propulsion engines ## Frequently asked questions ### What does tariff line 8409.91.10.40 cover in the United States tariff? In the United States tariff, line 8409.91.10.40 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, for vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704. ### What is the general (MFN) duty on 8409.91.10.40 in the United States? Goods under this line enter free of general (MFN) duty. The rate is published on 8409.91.10. ## Sources and updates 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. Official source files: - https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false Machine-readable: https://border.bot/countries/united-states/hs-codes/8409911040.json