For Honda Accord CB 4" Rolled Muffler Tip Catback Exhaust+Intake Pipe+Blue Air Filter Made of High Quality T-304 Stainless Steel with Computerized Mandrel-Bends for Strength and Durability TIG Welded CNC Machine Flange for Resistance Against Pressure and Corrosion Catback - 4"(OD) Muffler Rolled Tip / 2.25"(ID) Inlet / 2.25"(ID) Main Piping / Double Walled Muffler Tip Intake - Inlet: 3" / Helps Engine to Draw in More and Colder Air Resulting in Better Throttle Response and Higher Explosive Horsepower Output Air Filter is Micro Cotton Gauze Type Filter Material, Washable with Water or Soap, and Reusable / Overall Dimensions: 6" (Length) X 6.25" (Diameter)