Increase horsepower and torque with a deeper, more aggressive exhaust noteWelded from mild steel, then bathed in a four-step chrome-plating processTri-Flo muffler begins as a 4'' muffler at the front and morphs into a 4'' x 5-3/4'' oval at the rearAll necessary mounting hardware and instruction included, ensuring problem-free installationMade in the U.S.A.