Cat-back System 409S - Dual Rear/Side Exit - Force II - Mild/Moderate Sound For 2009 to 2013 Chevrolet Silverado 1500 and GMC Sierra 1500 with a 4.8L V8 engine with Extended Cab and standard bed or Crew Cab and short bed configurations on a 143 inch wheelbase. For the person who wants the look of a traditional dual exhaust system with all the benefits that a Flowmaster Cat-back exhaust system provides. D.O.R./D.O.S. systems are the perfect choice, and include exit pipes for both dual out rear and dual out side configurations so that you can choose the one that fits your style. Force II systems deliver a moderate exterior tone and moderate to mild interior tone, and are suited to customers looking for efficiency improvements without a lot of noise. Especially recommended for towing applications. 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. Features: Stainless steel construction Increased engine performance and efficiency Patented Delta Flow technology Lifetime limited warranty Premium Flowmaster qualityPit Stop USA offers Flowmaster Cat-back System 409S - Dual Rear/Side Exit-Force II - Mild/Moderate Sound 817573 at low everyda prices. Be sure to check out all of our products from Flowmaster including Flowmaster GMC Truck / SUV Exhaust Systems, Chevrolet Truck / SUV Exhaust Systems.