A catalytic converter uses a coated ceramic or metallic substrate to convert harmful exhaust gases into less harmful compounds before they reach the tailpipe – it's a legally required part of your exhaust system, and a common failure point on older or high-mileage vehicles. We carry three main categories: standard replacement converters that match your factory specification, universal converters for custom exhaust builds, and performance/high-flow converters for turbocharged and modified vehicles chasing extra flow.

What's the difference between a standard and a performance catalytic converter?

A standard replacement converter matches your vehicle's original specification for emissions and flow, while a performance (high-flow) converter uses a lower cell count to reduce backpressure, trading some emissions control for extra flow on modified or turbocharged vehicles.

What does the cell count of a catalytic converter mean?

Cell count refers to how many small channels per square inch run through the converter's honeycomb substrate. Higher cell counts (like 400 cell) give better emissions control and closer-to-factory flow, while lower cell counts (like 100 cell) flow more freely but with reduced emissions filtering.

Do I need a diesel-specific catalytic converter?

Yes – diesel and petrol catalytic converters use different catalyst formulations because diesel exhaust chemistry is different. A diesel catalytic converter is typically paired with a diesel particulate filter rather than fitted on its own.

How do I know what Euro emissions rating my catalytic converter needs?

Your Euro rating requirement depends on your vehicle's compliance date and original specification, found in your vehicle's compliance plate or handbook. Fitting the wrong Euro-rated converter can cause your vehicle to fail an emissions or roadworthy inspection.