Corsa 21186 Xtreme Cat-Back Exhaust System (Polished Tips) for 11-24 Dodge Durango 5.7L Hemi. The CORSA Xtreme dual rear exit cat-back exhaust system for 2011 Dodge Durango 5.7L V8 delivers aggressive sound, improves airflow by up to 51%, reduces weight by 21 lbs, and enhances the V8's performance with durable stainless steel construction and dual wall tips in polished or black PVD finishes.