Constructed of T-304 stainless steel with free-flowing mandrel bent tubing. Features semi-polished muffler with two distinctive sounds that meet all Federal decibel requirements: Touring (more aggressive than stock) and Performance (much more aggressive than stock). Adjustable and interchangeable, fully-polished stainless steel tips with GMC logo available separately. The only performance exhaust system engineered by GM for your GM vehicle. Limited Lifetime Warranty; see dealer for details.