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HSChapter 84
U.S. imports of catalytic converters and particulate filters for internal combustion engines (HS 842132) totaled $249.6M in April 2026, traded with 39 countries.
Importers of Catalytic Converters and Particulate Filters for Internal Combustion Engines paid $5.2M in duties in April 2026 — an effective duty rate of 18% on $29.5M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataCatalytic converters and diesel particulate filters reduce harmful exhaust emissions from internal combustion engines and are subject to stringent EPA and state-level (particularly California CARB) compliance requirements that govern both OEM and aftermarket products entering US commerce. Mexico and Canada are the leading suppliers, reflecting tightly integrated North American automotive production networks. Goods from Germany and South Korea are also significant, and importers should be aware that aftermarket catalytic converters must meet EPA emissions standards to be legally sold or installed in the US.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Aftermarket catalytic converters imported for sale or installation in the US must comply with EPA regulations under the Clean Air Act, which prohibit the sale of converters that do not meet applicable emission standards. California additionally requires CARB Executive Order certification for vehicles registered in the state. Importers should obtain compliance documentation from the manufacturer before entry.
Under the US schedule, the single 10-digit line 8421320000 is described as 'catalytic converters,' which encompasses both catalytic converters and particulate filters for purifying or filtering exhaust gases from internal combustion engines as defined at the HS6 level. Importers should ensure the commercial invoice description aligns with the specific product type for accurate CBP review.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $159.8M | $38.6M | -$121.2M |
| CANADA | $48.8M | $32.7M | -$16.1M |
| GERMANY | $9.6M | $7.3M | -$2.3M |
| KOREA, SOUTH | $13.2M | $293K | -$12.9M |
| JAPAN | $3.1M | $3.6M | +$517K |
Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8421320000 | CATALYTIC CONVERTERS | $249.6M | 17.59% | $5.2M |
CATALYTIC CONVERTERS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8421320000 | CATALYTIC CONVERTERS | $104.3M |
CATALYTIC CONVERTERS
246.3K no
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LAREDO, TX | $153.9M | $35.7M | -$118.2M |
| DETROIT, MI | $11.3M | $23.1M | +$11.7M |
| PORT HURON, MI | $19.6M | $3.0M | -$16.5M |