BMW F80 M3 & F82/83 M4 (Non GPF Models) - HJS Tuning ECE Downpipes Part_Valved GPF Back once the module is installed

once the module is installed it will default valve behaviour to be as follows

Cobra Sport Exhaust systems are designed to enhance the sound

This exhaust has a choice of 4" (101

5mm pipework and fit from the centre section backwards replacing the standard rear section with dual exit tailpipes

This exhaust makes the system louder as it removes the PPF filter and therefore

BMW F80 M3 & F82/83 M4 (Non GPF Models) - HJS Tuning ECE Downpipes Part_Valved GPF Back once the module is installedHigh performance, road legal downpipes with sports catalysts made by HJS in Germany. Designed to optimize vehicle power and sound while maintaining full European emission standards with ECE approval. Plug and Play fitment. Sound levels within 2dB of OE.