Are you looking for a race-winning muffler with the distinctive two-chamber sound? Look no further. Flowmaster's patented Delta Flow technology was used to create the Delta Force Race line mufflers. These Flowmaster stainless steel Delta Force 40 Series race mufflers provide excellent flow and scavenging, for added torque and horsepower in race applications. They are manufactured from fully welded 16-gauge stainless steel for maximum durability. This revolutionary technology has allowed Flowmaster to shrink case sizes for improved ground clearance.