This Flowmaster Force II® Axle-back system is designed for the 2007-2011 Jeep Wrangler JK's with the 3.8L engine, and replaces the original transverse muffler located behind the rear axle using factory connections. Features include 2.50 in. mandrel-bent stainless steel tubing for maximum durability, uses the factory hanger locations for a quick and easy installation. The system includes a Super 50™ Series performance muffler with the mandrel-bent tailpipe tucked up high in the chassis protecting the exhaust from rocks and debris when out on the trail. The system is finished off with a large 3.00 in. brushed stainless steel tip and delivers a mild to moderate interior tone with a moderate deep exterior sound that is suited to customers looking for engine efficiency improvements without a lot of noise. Like all Flowmaster® systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Covered by our Lifetime Limited Warranty for years of service.