Mustang 4.0L 2005, Armor Lite Aluminized Steel Axle-Back Exhaust System with Single Rear Exit by MBRP. Exhaust System Type: Axle-Back. Exhaust Tubing Material: Aluminized Steel. Main Tubing Diameter: 3". Exhaust System Sound: Moderate. To get the maximum out of your exhaust system, get this top-quality product from MBRP, the brand that stands at the forefront of performance exhaust technology. Designed to deliver trouble-free, consistent performance Right for your vehicle and lifestyle Made from high-quality materials for ultimate durability Manufactured to meet or exceed strict quality requirements If you have any questions or need fitment information for your vehicle, please contact with us