Increased power and torque Beautiful show chrome finish S&S engineered high flow catalysts performs as well or better than many catalyst free "Race Only" parts Stainless steel header construction with power building merge collector All hardare included 4.5" muffler with Highlight Machined Sidewinder end cap Deep performance exhaust note Removable dB reducer included SAE J2825 Sound Level compliant 50 State EPA and CARB legal: EO# K-010-3