WALKER EXHST 47774 Quiet-Flow Stainless Steel Muffler Assembly 2000-2006 Toyota Tundra Spun-locked heads help resist ruptures due to backfires. Bridge construction for structural strength and a long service life. Durable internal partitions for greater interior structural stability and a long service life. The inner shell and outer cover lockseams are positioned 180 degree apart for maximum durability. Strong&#44; OE-style interior spot welds help improve structural stability and increase durability.