MAD - Catback Exhaust || M340i/ M440i B58

The MAD BMW M340 M440 catback exhaust system is a statement in refined power and acoustics. Engineered with meticulous attention to detail, this exhaust system redefines the sound and performance of your BMW M340 or M440. One of the standout features of this exhaust system is that it can reuse the stock tips, providing a seamless integration with the aesthetics of your BMW. You can also choose one of our three quad tip options to give that quad look *Requires removing the oem tips or adding a aftermarket quad diffuser*  The system is a full catback, designed to offer the richest sound possible, turning every drive into an exhilarating experience. Installation is a breeze with no cutting required. This system is 100% plug and play, making it a completely reversible modification if you ever wish to return to the stock exhaust. Constructed entirely from 304 stainless steel, this exhaust system is as durable as it is striking. The larger diameter piping enhances the flow, promoting superio