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. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. 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: Mandrel Bent 16 Gauge Aluminized Tubing 3 Year Limited Warranty Moderate Exterior Exhaust Tone Includes Hangers and Hardware For Easy Installation Connects After Factory Catalytic Converter Dual Out Rear Or Dual Out Side Exit Dyno Tuned for Maximum PerformanceProduct Description: '99-'06 Chev. / GMC Truck, 1/2Ton, 4.8L / 5.3L, (W/Single Flanged Cat), 2/4 Wheel Drive, Ext.Cab / Short Bed, 143.5" WB, Super 40 Series Muffler, 2.50" Outlets, 3.00 Rolled Edge, Logo Embossed Stainless Tips, American Thunder, Incl. Tube Extensions For DOR And DOS In Kit, Mandrel Bent Tubing,16 Gauge Aluminized SteelPit Stop USA offers Flowmaster American Thunder Single Exhaust System - 1999-2006 Chevy/GMC 1500 4.8L/5.3L 17428 at low everyday prices. Be sure to check out all our products from Flowmaster including Flowmaster Chevrolet 2500/3500 Exhaust Systems And Components, Flowmaster Chevrolet Truck / SUV Exhaust Systems and Flowmaster GMC Truck / SUV Exhaust Systems.