The Flowmaster Delta Force 40 Series Race Mufflers are engineered for those who demand power and performance without excessive noise. Built with FlowmasterÂ’s race-proven Delta Flow technology, these mufflers deliver excellent horsepower characteristics while significantly reducing decibels compared to open headers. Constructed from durable, fully welded 16-gauge stainless steel, the two-chamber design ensures long-lasting reliability under the most extreme racing conditions. With no internal packing to blow out, you can count on consistent performance and sound quality run after run. Ideal for any racing application where mufflers are required, the Delta Force 40 Series provides the perfect balance of aggressive tone and sound control.