Stainless Steel Construction Resists Corrosion. Delivers The Ultimate In Sound And Performance. Provides Extra Punch In The Passing Lane. Fabricated Using The Highest Quality Materials. Ensures Maximum Exhaust Gas Flow Which Significantly Boost HP. Installation At Home Without Special Tools. Mandrel-Bent/ All Welded/ Built to Last. Does Not Get Obnoxious At Full Throttle. Includes Street Pro Mufflers. Includes Polished Stainless Classic Double Box Tips. Increases Horsepower By 10-18.