400 Cell Catalytic Converters

Maintain your vehicle’s environmental standards without sacrificing engine efficiency with our range of 400 cell catalytic converters. Often referred to as "high-flow standard replacements," these 400 CPSI (cells per square inch) units offer a less restrictive internal structure than many factory 600+ cell converters. This makes them the ideal choice for modern street cars and 4WDs that require higher exhaust throughput to support performance modifications while still effectively preventing "check engine" lights. Whether you need a universal round cat for a custom build or a direct-fit solution for your daily driver, our 400-cell range provides the reliability and flow your project demands.

Is a 400-cell converter better than a factory one?

Most factory catalytic converters feature a very dense 600 or 800 cell count to maximize filtration, which can restrict power. A 400-cell converter opens up that structure, reducing backpressure and allowing for better engine response while still providing enough surface area to meet emissions standards for most street applications.

Will a 400-cell converter stop my "Check Engine" light (CEL)?

In many cases, yes. While more aggressive 100 or 200 cell race cats often trigger efficiency codes because they flow "too fast" for the O2 sensors, a 400-cell unit typically provides enough filtration to satisfy the car's ECU, making it the safest "high-flow" choice for modern vehicles.

What is the difference between ceramic and metallic 400-cell cores?

Ceramic cores are the industry standard for daily drivers; they are effective and cost-efficient but can be brittle. Metallic cores are thinner and more robust, making them better suited for high-performance engines, lowered cars that might scrape, or vehicles used for heavy off-roading where vibration is high.

Can I use these for both petrol and diesel vehicles?

Yes, but you must select the correct unit for your fuel type. We stock specialized 400-cell petrol converters as well as high-efficiency CleanCore solutions specifically designed for diesel engines and DPF-equipped vehicles to ensure maximum performance and longevity.