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 Delta Force 40 Series mufflers provide excellent flow and scavenging for added torque and horsepower in race applications. This revolutionary technology has allowed Flowmaster to shrink case sizes for improved ground clearance. Flowmaster builds this series of mufflers by hand to ensure that they are the very best, in the most demanding environments.