A friend bought a cheaper muffler. Because it was shorter, he also had to buy an extension adapter. Which made the price of this device about the same. The old muffler actually came loose at the ends of the intake and exhaust pipes. What I noticed is that the intake and exhaust pipes on this muffler are not just pressed into the main unit, they have a rear flange where the pipes are spot welded. He's much calmer. without a noticeable reduction in engine power.