Heavy-Duty Diesel Oxidation Catalyst (DOC)
A flow-through catalytic converter that oxidizes CO and HC in heavy-duty diesel truck exhaust upstream of DPF/SCR systems. Falls under HTS 8421.32.00.00 as catalytic apparatus for internal combustion engine exhaust purification.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for oxidizing gases in non-engine processes
General oxidation catalysts not for vehicle exhaust use different gas filtering provisions.
If imported pre-assembled with DPF and SCR
Complete Selective Catalytic Reduction (SCR) systems classify as vehicle exhaust parts.
If for large industrial turbine or generator exhaust
Non-road stationary engine exhaust components may fall under other apparatus headings.
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Import Tips & Compliance
• Certify compliance with EPA Heavy Duty Engine standards (40 CFR 86)
• Document canning material (stainless steel grade) and weld specifications
• Separate DOC from complete aftertreatment systems to maintain standalone classification
Related Products under HTS 8421.32.00.00
Diesel Particulate Filter (DPF) for Light Trucks
A ceramic wall-flow particulate filter designed to capture soot and particulate matter from diesel engine exhaust in light trucks. It falls under HTS 8421.32.00.00 as a particulate filter for purifying exhaust gases from internal combustion engines. Regeneration occurs via active or passive methods to burn off trapped particulates.
Three-Way Catalytic Converter for Gasoline Passenger Cars
A catalytic converter containing platinum, palladium, and rhodium catalysts on a ceramic honeycomb substrate to simultaneously reduce CO, HC, and NOx in gasoline engine exhaust. Classified under HTS 8421.32.00.00 for purifying exhaust from internal combustion engines. It operates efficiently across a wide temperature range.
Gasoline Particulate Filter (GPF) for Direct Injection Engines
A wall-flow filter coated with three-way catalysts to trap fine particulates from gasoline direct injection engines while converting pollutants. HTS 8421.32.00.00 applies as a combined particulate filter and converter for combustion engine exhaust purification.
Motorcycle Catalytic Converter with Lambda Sensor
Compact metallic substrate catalytic converter for motorcycles, often integrated with oxygen sensor ports for closed-loop control. Classified in HTS 8421.32.00.00 for filtering/purifying two-wheeler internal combustion engine exhaust.
SCR Catalyst for Diesel Exhaust Aftertreatment
Selective Catalytic Reduction (SCR) converter using urea/DEF to convert NOx in diesel exhaust of commercial vehicles. HTS 8421.32.00.00 covers this catalytic apparatus for purifying internal combustion engine gases.
OEM Replacement Catalytic Converter for Toyota Camry
Direct-fit replacement three-way catalytic converter engineered for 2.5L Toyota Camry engines, meeting original emissions specifications. Falls under HTS 8421.32.00.00 as apparatus for purifying automobile internal combustion exhaust.