Description: 3.6L, center. 3.9L, exhaust pipe, rear. 3.8L, center. 3.4L, center. 5.3L, exhaust pipe, rear. Dual Exhaust. Single Exhaust. 5.3L, center. Helps keep muffler secure Helps prevent muffler rattle This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Collision parts are designed to help promote proper and safe repair