A Sound Alternative from Flowmaster! The perfect choice for a variety of vehicle styles and engine applications, Flowmaster’s dBX® mufflers utilize cutting edge laminar flow technology drawn from both the HP2 and Pro Series muffler lines to provide maximum performance and deliver a sound quality like no other. The key to it’s superior performance and smooth refined tone is the patented core design, which delivers maximum exhaust efficiency, while at the same time minimizing the interior drone that is associated with other performance mufflers.