A BMW stands out because of its balance between performance, handling and driver feel. The way it responds on the road, the smooth power delivery and the strong connection between driver and machine all play a part. From older models to newer ones, the focus has always been on giving a controlled and engaging driving experience. Sound is also part of that identity, as a BMW engine has a tone that many drivers enjoy. Upgrading to a performance BMW exhaust can improve that sound while also helping the engine breathe better. Types of Performance Exhausts Cat-Back A cat-back system replaces everything from the catalytic converter to the rear of the car. This includes the mid-pipe, resonators and muffler. It is one of the safest and most popular upgrades because it does not interfere with emissions equipment. It gives a noticeable change in sound and a small improvement in airflow. Many drivers choose a cat-back performance BMW exhaust as a first step into the world of performance ga...