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Supplier details checked 2026-09-23 · Test catalog
1999-2002 Chevrolet Silverado 2500 & GMC Sierra 2500 with 6.0L engine - Non HD models. - Aggressive sound
Flowmaster American Thunder Cat-back Exhaust System
Includes an Aluminum Heat Shield for Rapid Heat Dissipation
Includes a Large 3.50-inch Polished 304 Stainless Steel Tip
Includes Hangers and Hardware for an Easy Installation
Mandrel-bent 16-gauge Aluminized Steel Tubing
Dyno-tuned for Maximum Performance
Stainless Steel Heat Shield Clamps
Uses the Factory Hanger Locations
Aggressive Exterior Exhaust Tone
Easy Installation
Fits 1999-2002 Chevrolet Silverado and GMC Sierra 2500 3/4 Ton truck (not-HD) with 6.0L engine, fits 2/4 wheel drive with extended cab/short bed configuration on 143.5-inch wheelbase.
Flowmaster 99-02 Chevrolet/GMC Truck 144in. Wheelbase American Thunder Cat-Back Exhaust System
9902 CHEVGMC TRK 144 WB A T
SYS 99-02 CHEV/GMC T
For the person who wants a subtle custom appearance with all the benefits that a Flowmaster Cat-back exhaust system provides. This American Thunder system delivers a moderate interior tone with a deep powerful exterior tone and is suited to the enthusiast who wants their performance to be heard. The system attaches to the back of the catalytic converter with a dual inlet 50 Series Big Block muffler for a deep powerful sound without being obnoxious. Includes a large custom formed aluminum heat shield with stainless clamps and easily attaches directly to the muffler body. The custom bent 3.00-inch aluminized steel tailpipe uses the factory hanger locations for an easy installation and exits out behind the right side rear wheel which is ideal for towing. The tailpipe is finished off with a large 3.50-inch polished 304 stainless steel tip embossed with the Flowmaster logo. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts, hardware and easy to follow instructions for a trouble free installation. Notes: Fits 2/4 wheel drive trucks with the extended cab/short bed configuration - 143.5-inch wheelbase.
SYS 99-02 CH
