Custom mufflers are designed to improve exhaust flow and reduce back pressure in order to enhance engine performance. They generally consist of several sound-absorbing baffles and chambers that are tuned to provide a desired sound output, while also allowing maximum flow through the system. The baffles are constructed from various materials, such as stainless steel or aluminized steel, and are designed to absorb sound waves and reduce noise levels.
Additionally, custom mufflers may include additional features such as catalytic converters that help reduce toxic emissions from the exhaust system.