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Representative imageManufacturer information. Check the part number and installation requirements for your vehicle.
Supplier details checked 2026-09-23 · Test catalog
2001-2006 Chevrolet Suburban, Avalanche, GMC Yukon XL 1500 with 5.3L engine. Aluminized Steel - Aggressive to moderate sound
Flowmaster American Thunder Cat-back Exhaust System
Specially Tuned Resonator to Help Control Interior Drone
Includes Hangers and Hardware for an Easy Installation
Mandrel-bent 16-gauge Aluminized Steel Tubing
Deep Powerful Exterior Exhaust Tone
Dyno Tuned for Maximum Performance
Uses the Factory Hanger Locations
Polished Stainless Steel Tips
Fits 2001-2006 Chevrolet Suburban, Avalanche and GMC Yukon XL 1500 with 5.3L engine (Does Not Fit with Auto-Leveling Option.)
Flowmaster 01-06 GM SUB/AVAL/Yukon XL American Thunder Cat-Back Exhaust System
0106 GM SUBAVALYKN XL AMT DOS
SYS 01-06 GM SUB/AVA
For the person who wants a subtle custom appearance with all the benefits that a Flowmaster® Cat-back exhaust system provides. This American Thunder® exhaust system delivers a deep powerful exterior tone with a mild to moderate interior tone. The mandrel-bent 3.00-inch aluminized steel tubing flows into a specially designed resonator and the Super 50 Series™ performance muffler helps keep things fairly mellow inside the cab area of the vehicle. The system uses the factory hanger locations and the dual 2.50-inch tailpipes are finished off with 3.00-inch polished stainless steel tips. Like all Flowmaster systems, benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation and is covered by our 3-year Limited Warranty. This system is covered by our 3-year Limited Warranty. Check out system #817342 for those who prefer a full stainless steel exhaust system covered by our Lifetime Limited Warranty.
SYS 01-06 GM
