CN code 870892 covers silencers (mufflers) and exhaust pipes, and their parts, intended for motor vehicles under headings 8701 to 8705. The exhaust system is responsible for routing exhaust gases from the engine, reducing noise, and cleaning exhaust gases. This code classifies rear silencers, centre silencers, exhaust pipes, exhaust manifolds, flexible connectors, clamps, and exhaust system hangers. The code also covers catalytic converters and particulate filters (DPF/GPF) as exhaust system elements. Importing silencers and exhaust pipes follows standard customs procedures, and duty rates should be verified in the TARIC or ISZTAR system. Exhaust system elements serving emission control functions are subject to specific regulatory requirements under Euro standards.

Exhaust system elements affecting emissions – catalytic converters, DPF/GPF particulate filters, and SCR systems – must comply with UNECE Regulation No. 103 on replacement pollution control devices. Replacement catalytic converters and DPF filters for the aftermarket require type approval confirming they provide emission cleaning effectiveness comparable to original parts. Silencers as noise-affecting elements are subject to UNECE Regulation No. 59 on replacement silencing systems. Aftermarket exhaust elements should carry E-mark designation where they affect emissions or noise. Catalytic converter imports are subject to inspection due to precious metal content (platinum, palladium, rhodium). Customs authorities may require additional documentation confirming the legal provenance of catalytic converters.

The exhaust system market is heavily regulated by emission and noise standards. Tightening Euro standards affect the complexity and cost of exhaust systems, increasing the share of catalytic converters, DPF/GPF filters, and SCR systems in total system value. The aftermarket exhaust market includes both functional replacements meeting emission standards and performance exhaust systems with modified acoustic characteristics. Importing performance exhaust systems requires verification of compliance with local noise and emission regulations. Manufacturers such as Bosal, Walker, Eberspächer, and Akrapovič supply exhaust components to OEM and aftermarket channels. The trend towards electric vehicles will reduce long-term demand for traditional exhaust systems, but the aftermarket for the existing combustion vehicle fleet will remain active.