When it comes to performance exhaust systems, most people are looking for three things: Power, sound, Exhaust 40-1538 2.5″ Stainless Steel Exhaust System 2011-15 Dodge Durango 5.7L Hemi/3.6L V6 Axle Back Exhaust 4″ Double Wall Angle Cut 304SS Tips. Exhaust 40-1538 2.5″ Stainless Steel Exhaust System 2011-15 Dodge Durango 5.7L Hemi/3.6L V6 Axle Back Exhaust 4″ Double Wall Angle Cut 304SS Tips. Axle Back Dual Exhaust Automotive Specialty Parts for Dodge Durango Designed for 2011-2021 Dodge Durango models, enhancing performance and sound Constructed from high-quality 409SS stainless steel for durability and corrosion resistance Features mandrel-bent tubing for optimal exhaust flow and improved horsepower Quality performance mufflers provide a deep, aggressive exhaust tone without excessive noise inside the vehicle Easy installation with a direct fit design, replacing the restrictive factory exhaust system Enhances overall efficiency and performance of your vehicle