Key facts
- HS subheading
- 8409.91
- National lines
- 11
- Tariff
- United States
- Chapter
- 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
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.
United States lines under 8409.91
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.
- 8409.91.10.40For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704Duty: Free
- 8409.91.10.60For marine propulsion enginesDuty: Free
- 8409.91.10.80OtherDuty: Free
- 8409.91.30.00Aluminum cylinder headsDuty: 2.5%
- 8409.91.50.10Connecting rodsDuty: 2.5%
- 8409.91.50.81Steel forgingsDuty: 2.5%
- 8409.91.50.85OtherDuty: 2.5%
- 8409.91.92.10Connecting rodsDuty: 2.5%
- 8409.91.92.90OtherDuty: 2.5%
- 8409.91.99.10Connecting rodsDuty: 2.5%
- 8409.91.99.90OtherDuty: 2.5%
In other countries
No other national tariff on border.bot has live lines under 8409.91 yet.
Frequently asked questions
How many national tariff lines does the United States tariff have under HS 8409.91?
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.
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: