Walker SoundFX Mufflers and Muffler Assemblies are engineered to deliver favorable sound quality. Made from 100% aluminized quality materials and construction, reinforced bracket and spun locked heads, and mechanical interior joints the Walker SoundFX Muffler will give you a quality appearance, performance, and sound!. Walker, an industry leader in emission control products, offers a complete line of exhaust and emission control products and has been a driving force of innovation for over a century.