300-Cell Stainless Steel Catalytic Converter

The HJS 90 81 2020 is an ECE-approved catalytic converter, offering a direct upgrade for enhanced downpipe performance in select BMW models. Engineered with a high-flow 300-cell stainless steel catalyst, it supports optimal exhaust gas flow while meeting stringent ECE compliance, ensuring it is registration-free. The design features a pipe diameter transition from 89 mm down to 80 mm, facilitating efficient exhaust gas management. This downpipe catalytic converter is specifically designed for the BMW 340i F30/F31 and 440i F32/F33 models equipped with the B58 engine (pre-OPF variant). The package includes the HJS ECE Downpipe with the 300-cell catalyst and the necessary ECE approval documentation.