Upgrading your factory cat-back exhaust system to a performance aftermarket is one of the most critical stepping stones on the path to building a high-performance monster. As with any exhaust upgrades, the end goal is to reduce backpressure and increase airflow. With smooth mandrel bends, larger diameter pipe, and high-flow mufflers, a cat-back system achieves exactly that. The smooth, deep sound that you crave is unleashed and brings music to the ears. A cat-back system is designed to directly replace everything behind the catalytic converter, all the way to the rear bumper. No custom fabrication is required, as cat-back systems are designed to fit each application without modification. Most systems are made from premium stainless steel to inhibit corrosion.