Aluminized steel construction for corrosion resistance and durabilityMechanical interior joints for durabilitySpun-locked heads for rupture resistanceTube-and-partition style interior designProvides installers and DIY customers with economical performance and acousticsWalker Tru-Fit universal mufflers are an economical replacement option. These mufflers are manufactured with 100% aluminized steel, and have a tube-and-partition interior design.