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Manufacturer information. Check the part number and installation requirements for your vehicle.
Supplier details checked 2026-09-23 · Test catalog
Fits 2011-2018 Chevrolet Silverado 1500, GMC Sierra 1500 with 6.2L engine. - Aggressive to moderate sound
Flowmaster American Thunder Cat-back Exhaust System
Dyno Tuned For Maximum Performance
Uses the Factory Hanger Locations
Your Choice of Two Tailpipe Exits
50 Series HD Performance Muffler
Clears the Factory Spare Tire
Stainless Steel Construction
Lifetime Limited Warranty
Fits 2011-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 with 6.2L engine, 2/4 WD model with Crew Cab/Short Bed (143.5" WB), Crew Cab/Standard Bed (153" WB) and Double Cab/Standard Bed (143.5" WB).
Flowmaster 11-18 GM 1500 CC-EC 6.2L American Thunder Cat-Back Exhaust System
1118 GM 1500 CCEC 62L AMT DOR
SYS 11-18 GM 1500 CC
The American Thunder® Cat-back exhaust system for 2011-2018 Chevrolet Silverado and GMC Sierra 1500 trucks with the 6.2L engine, is perfect for the person looking for an aggressive exterior sound level while maintaining a moderate interior tone. This bolt-on stainless steel system features a 3.50-inch mandrel-bent inlet pipe flowing into the 50 Series™ HD performance muffler with large 4.00-inch internals and a built-in tuned resonance chamber to minimize interior drone. The system has dual 2.50-inch mandrel-bent tailpipes which use the factory hanger locations and are finished off with large 3.50-inch polished stainless steel tips. This exhaust system gives you choices for tailpipe exit location either out each side behind the rear tires if you do a lot of towing, or straight-out under the rear bumper for a muscular look. The exhaust system is covered by our Lifetime Limited Warranty and includes all necessary parts and hardware for easy installation you can do at home. Note: Fits 2/4 WD model with Crew Cab/Short Bed (143.5" WB), Crew Cab/Standard Bed (153" WB) and Double Cab/Standard Bed (143.5" WB).
SYS 11-18 GM
