This American Thunder system fits 2001-2006 GM Suburban, Avalanche and Yukon XL 1500 SUV's and increases the horsepower, torque and mileage of these popular trucks. The exhaust system is constructed from 16-gauge mandrel-bent stainless steel and has a flanged resonator assembly flowing into a specially tuned resonator and a Super 50 Series performance muffler producing a mild to moderate interior tone and a deep exterior sound. The dual 2.50-inch tailpipes exit out the side of the vehicle behind the rear tires and are finished off with large pair of 4.00-inch polished 304 stainless tips. All necessary parts and hardware are included for a great fitting installation and is covered by Limited Lifetime Warranty.. 2001-2006 Chevrolet Suburban, Avalanche and GMC Yukon XL 1500 with 5.3L engine. Stainless Steel - Aggressive to moderate sound. Flowmaster 01-06 SUB/AVAL/Yukon XL American Thunder DOS SS Exhaust System. Includes Hangers and Hardware for an Easy Installation. Moderate Exterior Exhaust Note with Mild Interior Tone. Flowmaster American Thunder Cat-back Exhaust System. Dual 4.00-inch Polished 304 Stainless Steel Tips. Mandrel-bent 16-gauge Stainless Steel Tubing. Connects After Factory Catalytic Converter. Does Not Fit with Auto-Leveling Option.. Super 50 Series Performance Muffler. Includes Specially Tuned Resonator. Uses the Factory Hanger Locations. 0106 SUBAVALYKN XL AMT DOS 409S. Performance Look of Duals. Lifetime Limited Warranty. SYS 01-06 SUB/AVAL/Y. SYS 01-06 SU

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