Features Increases horsepower or torque Increased fumes flow for improved performance Better fuel economy during driving speeds Slightly louder compared to inventory at cruise with a very ambitious sound quality throughout acceleration Custom developed for every application Patented straight through muffler design minimizes backpressure while taking in good waves Mandrel bent stainless-steel tubes with diameters improved for diminished restriction while keeping exhaust gas rate Made out of probably the finest austenitic stainless steel for lasting longevity All welded development Compatibility 2014 2015 Chevrolet/GMC Silverado/Sierra 1500 5.3L Automatic/Manual Transmission Extended Cab Standard Bed 78.7 Crew Cab Short Bed...