The 4″ Downpipe-Back Exhaust (S6005P) from Armor Lite is a high-performance exhaust system designed for trucks. It features a single side exit and is made from durable materials to withstand tough conditions. Its key features include a 4″ diameter for increased airflow, a straight-through design for improved exhaust flow, and a polished finish for a sleek look. The benefits of this exhaust include improved engine performance, increased fuel efficiency, and a deep, aggressive sound. Its unique selling points are its high-quality construction and easy installation, making it a top choice for truck owners looking to upgrade their exhaust system.