Motorcycle catalytic converters for emissions and compliance

Motorcycle catalytic converters are essential components of the exhaust system, designed to reduce harmful emissions and ensure compliance with European environmental regulations. Integrated into motorcycle silencers or full exhaust systems, they play a key role in meeting standards such as Euro 3, Euro 4, Euro 5 and Euro 5+.

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		LeoVince catalytic converter 40 mm Catalyst 40 mm Code: 8605K Leovince offers a wide range of accessories for your motorcycle. Quality of materials, design and workmanship are distinctive features of each component produced. Code: 8605K	157,38€ 118,04€ Add to cart
		Leovince catalytic converter / catalyst for Kawasaki Versys 650 / ER6N/F 2007>2016 Leovince approved catalyst for polluting emissions HOMOLOGATED EURO3 Diameter 50mm The EC approved high-performance LeoVince Catalytic Converter has a honeycomb metal structure with noble... Code: 6522K	157,38€ 118,04€ Add to cart
		Leovince catalytic converter / catalyst for KTM 690 Duke / Enduro / SMC / R Leovince approved catalyst for polluting emissions HOMOLOGATED EURO3 Diameter 50mm The EC approved high-performance LeoVince Catalytic Converter has a honeycomb metal structure with noble... Code: 6522K	157,38€ 118,04€ Add to cart
		Leovince catalytic converter / catalyst for Husqvarna 701 Enduro / Supermoto 2015>2016 Leovince approved catalyst for polluting emissions HOMOLOGATED EURO3 Diameter 50mm The EC approved high-performance LeoVince Catalytic Converter has a honeycomb metal structure with noble... Code: 6522K	157,38€ 118,04€ Add to cart
		Leovince catalytic converter / Catalyst for Piaggio MP3 500 / Beverly 300/350 2011>2016 Leovince approved catalyst for polluting emissions HOMOLOGATED EURO3 The EC approved high-performance LeoVince Catalytic Converter has a honeycomb metal structure with noble metals (palladium,... Code: 6522CK	157,38€ 118,04€ Add to cart
		Spare parts Leovince 6522CK Leovince exhaust spare parts and componentsCODE: 6522CKLeovince exhaust parts to replace worn or broken components. This is a specific replacement part number, it cannot be adapted.ATTENTION:... Code: 6522CK	157,38€ 118,04€ Add to cart
		Leovince catalytic converter / catalyst for BMW G650GS 2011>2016 Leovince approved catalyst for polluting emissions HOMOLOGATED EURO3 Diameter 50mm The EC approved high-performance LeoVince Catalytic Converter has a honeycomb metal structure with noble... Code: 6522K	157,38€ 118,04€ Add to cart
		Leovince catalytic converter / catalyst for Honda Silver Wing 400 /600 / SWT400/SWT600 Leovince approved catalyst for polluting emissions HOMOLOGATED EURO3 Diameter 40mm The EC approved high-performance LeoVince Catalytic Converter has a honeycomb metal structure with noble... Code: 8605K	157,38€ 118,04€ Add to cart
		Leovince catalytic converter / catalyst for Triumph Street Triple 657/R 2013>2016 Leovince approved catalyst for polluting emissions HOMOLOGATED EURO3 Diameter 50mm The EC approved high-performance LeoVince Catalytic Converter has a honeycomb metal structure with noble... Code: 6522K	157,38€ 118,04€ Add to cart
		Leovince catalytic converter / catalyst for Ducati Monster 696/769/1100/821 / Scrambler 800 Leovince approved catalyst for polluting emissions HOMOLOGATED EURO3 Diameter 50mm The EC approved high-performance LeoVince Catalytic Converter has a honeycomb metal structure with noble... Code: 6522K	157,38€ 118,04€ Add to cart

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From a technical perspective, a motorcycle catalytic converter is a chemical device that uses catalytic materials such as platinum, palladium and rhodium to trigger oxidation and reduction reactions. These processes convert harmful gases produced during combustion—such as carbon monoxide and unburned hydrocarbons—into less harmful substances, reducing emissions while maintaining overall engine performance.

What is the purpose of a motorcycle catalytic converter?

The motorcycle catalytic converter reduces the environmental impact of the bike by lowering pollutant emissions and ensuring compliance with legal standards. It is a crucial component for road use and for passing mandatory vehicle inspections.

Beyond its environmental role, the catalytic converter also influences exhaust gas management, working together with headers and the silencer to maintain a balance between emissions, noise levels and performance.

What happens if you remove the catalytic converter?

Removing the motorcycle catalytic converter—a process known as decat—reduces exhaust restrictions, which may result in improved performance and a louder, more aggressive sound. However, this modification makes the motorcycle non-compliant with emission regulations, exposing the rider to fines, failed inspections and potential legal issues.

Additionally, removing the catalytic converter can affect engine operation if not supported by proper modifications, such as adjusting the motorcycle ECU, upgrading engine mapping or modifying the intake system with air filters and airboxes.

When is a catalytic converter homologated?

A motorcycle catalytic converter is homologated when it complies with European emission standards (such as Euro 5) and is specifically designed for a particular motorcycle model. Homologated systems are tested to ensure emission levels meet legal requirements, allowing safe and legal road use.

In the aftermarket world, decat pipes are also available. These components replace the original catalytic converter inside the exhaust system and are intended for racing use only, as they are not road-legal.

Types of motorcycle catalytic converters

Motorcycle catalytic converters are available in various configurations and diameters to ensure compatibility with different bikes and exhaust systems. Leading brands such as Akrapovic, Arrow, MIVV, Remus and Malossi offer model-specific solutions for both motorcycles and scooters, including popular models like Aprilia Tuono 660, Yamaha TMAX 560 and Vespa.

A common example is the Arrow catalytic converter, designed for installation on compatible exhaust systems, ensuring emission compliance and seamless integration.

Maintenance and efficiency

Maintaining the efficiency of the motorcycle catalytic converter is essential for proper exhaust system performance. A damaged or worn catalytic converter can negatively affect both emissions and engine efficiency.

Within this category, you will find:

Homologated motorcycle catalytic converters
Catalytic converters for aftermarket exhaust systems
Components compatible with slip-on and full exhaust systems
Solutions for motorcycles and scooters

Choosing the right motorcycle catalytic converter ensures reduced emissions, compliance with regulations and optimal exhaust performance, maintaining the correct balance between performance and environmental sustainability.