Harley-Davidson motorcycle riders understand thunder, especially in the context of Samson high performance slip-on mufflers. Samson “Rolled Thunder” mufflers produce the traditional sound and performance that American riders demand. The sophisticated look of the rolled edge muffler body adds a big batch of class to any Harley-Davidson Softail or FLH motorcycle. Low restriction Rolled Thunder mufflers generate a scavenging effect which results in a healthy increase in torque and horsepower over stock exhaust systems, corresponding with improved throttle response across the power band! Rolled Thunder Samson mufflers are available in both round (part number M-144), Oval (part number M-136) and Slant-Cut Oval (part number M-148) configurations! Fits all 1995 to 2015 Harley-Davidson Big-Twin Dresser (Bagger) or Road King model motorcycle applications. MSRP starting at $361.5 (B-Stock)!