Round Cat - Euro 5 (Double Brick) 400CPI

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Catalytic converters are commonly rated by CPI (Cells Per Inch), which refers to the number of internal honeycomb cells within the catalyst core. The CPI rating affects both exhaus t flow and emissions efficiency. 100 CPI – Lower cell density with larger passages, allowing maximum exhaust flow. Often preferred for high-performance or racing applications where flow is the priority. 200 CPI – A balanced option that still flows well while providing improved emissions performance compared to lower CPI cores. Commonly used in performance street builds. 400 CPI – Higher cell density with more internal surface area, designed to provide greater emissions conversion efficiency. Typically used where stricter emissions standards are required. Dimensions: 380mm long x 129mm Wide Body Show more