Seriously? Stainless steel muffler said to last three times longer than an aluminized muffler. Using that math I would have to replace the stock muffler EVERY YEAR or sooner. MY original OEM low grade stainless steel muffler lasted 17 (seventeen) years before needing replacement. LOOK ELSEWHERE for a quality long life muffler, this Walker SS rotted in LESS than three years after installation. These people are playing word games! This appears to be a manipulative indication that this is a quality long-term muffler.