GMC Yukon XL 1500 Performance Exhaust – Flowmaster American Thunder Cat-Back (2001–2006). Delivers a deep, powerful exterior note with a mild to moderate sound in the cabin for everyday drivability.

Built from mandrel-bent 3.00-inch, 16-gauge aluminized steel, this system flows through a specially tuned resonator into a Super 50 Series performance muffler to help control interior drone. Dual 2.50-inch tailpipes finish with 3.00-inch polished stainless tips. It reuses factory hanger locations, includes all required hangers and hardware for an easier install, and carries a 3-year limited warranty. Benefits include improved throttle response, power, and mileage. Fitment: 2001–2006 GMC Yukon XL 1500 with 5.3L (also Chevrolet Suburban and Avalanche 5.3L). Does not fit vehicles with Auto-Leveling.

Features

• Mandrel-bent 3.00-inch aluminized steel tubing
• Super 50 Series muffler with tuned resonator
• Dual 2.50-inch tails, 3.00-inch polished stainless tips
• Uses factory hanger locations; hardware included
• Deep exterior tone; mild to moderate interior
• Dyno tuned; 3-year limited warranty
• Stainless option #817342 available with Lifetime Limited Warranty

Questions or ready to schedule installation or customization? Call our Austin shop at 512-982-9393 (TX) or our Los Angeles area shop at 562-981-6800 (CA). We offer professional installation and customization at both locations.

If you’re purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.