SCR Catalyst for Diesel Exhaust Aftertreatment
A Selective Catalytic Reduction (SCR) converter using urea/DEF to convert NOx in diesel exhaust of commercial vehicles. It falls under tariff item 8421.32.00 as catalytic apparatus for purifying internal combustion engine gases.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the SCR system is for stationary engines
Covers other gas purification machinery not elsewhere specified.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the SCR catalyst is compatible with the vehicle's DEF system and meets Canadian emission standards
• Provide technical data sheets to CBSA for classification
• Ensure the catalyst is free of any restricted materials
Related Products under Tariff item 8421.32.00
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 tariff item 8421.32.00 as a particulate filter for purifying exhaust gases from internal combustion engines.
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. It falls under tariff item 8421.32.00 as a combined particulate filter and catalytic converter for exhaust gas purification.
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. It falls under tariff item 8421.32.00 as catalytic apparatus for internal combustion engine exhaust purification.
High-Flow Performance Catalytic Converter for Subaru WRX
A 400 CPI high-flow catalytic converter designed for Subaru WRX turbo engines, balancing emissions control with performance. It falls under tariff item 8421.32.00 as an aftermarket converter purifying internal combustion exhaust gases.
Marine Diesel Engine Catalytic Converter
A corrosion-resistant catalytic converter for inboard marine diesel engines meeting IMO Tier III NOx standards. It falls under tariff item 8421.32.00 as apparatus for purifying exhaust gases from internal combustion engines in marine applications.
Motorcycle Catalytic Converter with Lambda Sensor
A compact metallic substrate catalytic converter for motorcycles, often integrated with oxygen sensor ports for closed-loop control. It falls under tariff item 8421.32.00 for filtering and purifying exhaust gases from two-wheeler internal combustion engines.