Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is a complete, bolt-on upgrade engineered to unlock more horsepower, torque, and even improved mileage from your GM SUV. Purpose-built for 2001-2006 GM Suburban, Avalanche, and Yukon XL 1500 models, this American Thunder series kit replaces the restrictive factory piping with a free-flowing, performance-tuned system that transforms both the sound and the driving character of these popular trucks.
Every component is constructed from durable 16-gauge mandrel-bent stainless steel, ensuring smooth, uninterrupted exhaust flow and long-term resistance to corrosion. The system pairs a flanged resonator assembly with a specially tuned resonator and the legendary Super 50 Series performance muffler, delivering a mild to moderate tone inside the cabin and a deep, aggressive note on the outside.
Key Benefits
This cat-back system is designed to give you noticeable performance gains without a harsh, droning interior experience. The Super 50 Series muffler and dual chambered resonators work together to produce a refined yet muscular exhaust character, while the mandrel-bent stainless construction maximizes flow and durability. The dual 2.50-inch tailpipes exit out the side of the vehicle behind the rear tires and are capped with a large pair of 4.00-inch polished 304 stainless tips for a bold, finished appearance.
- Constructed from 16-gauge mandrel-bent stainless steel for maximum flow and durability
- Super 50 Series performance muffler with front and rear chambered resonators for a deep exterior tone and moderate interior sound
- Dual 2.50-inch side-exit tailpipes that route behind the rear tires
- Large 4.00-inch polished 304 stainless steel exhaust tips
- 3.00-inch inlet diameter and dual tailpipe design
- All necessary parts and mounting hardware included for a great-fitting installation
Sound & Performance
Flowmaster tuned this American Thunder system to strike the balance drivers want: an aggressive to moderate sound profile that stays civil at cruise but comes alive under throttle. The chambered front resonator (8.00-inch body width) and chambered rear resonator (4.00-inch body width) are matched to the Super 50 muffler to control tone, while the mandrel-bent 3.00-inch inlet keeps exhaust gases moving for real-world horsepower and torque gains.
Fitment
This system is engineered specifically for 2001-2006 GM Suburban, Avalanche, and Yukon XL 1500 SUVs in 4WD applications. Because it is a complete cat-back kit, all necessary parts and hardware are included so you can achieve a precise, factory-quality fit. Please note this system carries a California Proposition 65 warning and is CARB (California) compliant, making it a smart choice for emissions-conscious owners.
Backed by a Limited Lifetime Warranty, the Flowmaster American Thunder Cat-back Exhaust System is a lasting investment in the performance, sound, and appearance of your GM truck. Upgrade with confidence and give your Suburban, Avalanche, or Yukon XL the exhaust it deserves.
