Unique open-chambered design provides increased horsepower and torque by increasing airflow and reducing back pressure. Distinct aggressive sound. 409 stainless steel pipes and muffler. 304 stainless steel exhaust tips with chrome flashing helps prevent peeling. Installation is quick and easy. Uses factory hanger locations. No vehicle modifications are required. Does not negatively affect emissions. Fits both Ford factory and ROUSH rear valance. No in-cockpit boom/drone. 3 Year Limited Warranty. Fits manual and automatic. Tips have oval-shaped openings: 4" x 4.5". Includes the following: (1) LH Muffler Assembly, (1) RH Muffler Assembly, (2) Round Powder Coated Black Exhaust Tips, (2) Inlet Pipe Spherical Clamps, (2) Exhaust Tip Clamps, (1) Installation Manual