</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →

Marine Diesel Engine Catalytic Converter from Mexico

Corrosion-resistant catalytic converter for inboard marine diesel engines meeting IMO Tier III NOx standards. HTS 8421.32.00.00 includes marine internal combustion engine exhaust purification apparatus.

Duty Rate — Mexico → United States

25%

Rate breakdown

9903.94.0525%Except for products described in headings 9903.94.06, 9903.94.32, 9903.94.33, 9903.94.42, 9903.94.43, 9903.94.44, 9903.94.45, 9903.94.52, 9903.94.53, 9903.94.54, 9903.94.55, 9903.94.62, 9903.94.63, 9903.94.66 and 9903.94.67, automobile parts, as provided for in subdivision (g) of U.S. note 33 to this subchapter
9903.74.110%Articles as provided for in subdivision (l) of U.S. note 38 to this subchapter.
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)

Import Tips

Include IMO Tier III or EPA Tier 4 Marine certification

Specify marine-grade stainless steel construction

Document vibration and saltwater resistance testing