With thirty-five years of experience, Flowmaster has specialized in automotive science and various patent protecting technologies. Ushering a new standard, the brand has shown a revolutionary development in the past few decades. The brand has an aim to design the best automotive products, delivering high-end performance. The highest quality of exhaust products, advanced manufacturing techniques and unwavering dedication toward customers are what set this brand apart from others. Flowmaster Performance has embraced innovative technologies to improve its product line. From its FlowFx straight-through design to legendry chambered, every product delivers outstanding performance.
Flowmaster's American Thunder Cat-back exhaust system for the 2011-2018 Chevrolet/GMC Silverado/Sierra 1500 pickups with the 6.2L V8 engine is perfect for the person looking for an aggressive exterior sound level while maintaining a moderate interior sound with all of the performance benefits that you would expect from Flowmaster. This bolt on 409S stainless steel system features a 3.50 inch inlet pipe assembly that runs into a 50 HD Series muffler. The systems uses 2.50 inch mandrel bent tailpipes for maximum performance and then is finished off with 3.50 inch polished stainless steel tips with embossed Flowmaster logos. This dual exit system can be exited out each side or straight out under the rear bumper. The exhaust system is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.
- Flowmaster Reliability.
Cat-Back System 409S - DOR/S - American Thunder - Moderate Sound.
2011-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 Crew Cab and Double Cab models with 6.2L V8 gas engine. Professional installation by a licensed mechanic required.
Fitment & Application:
- 2018 GMC Sierra 1500 SLT 6.2L V8 69.3 inch Bed EXT Cab
- 2017 GMC Sierra 1500 SLT 6.2L V8 69.3 inch Bed EXT Cab
- 2016 GMC Sierra 1500 SLT 6.2L V8 69.3 inch Bed EXT Cab
- 2015 GMC Sierra 1500 SLT 6.2L V8 69.3 inch Bed EXT Cab
- 2014 GMC Sierra 1500 SLT 6.2L V8 69.3 inch Bed EXT Cab
- 2013 GMC Sierra 1500 SLT 6.2L V8 69.3 inch Bed EXT Cab
- 2012 GMC Sierra 1500 SLT 6.2L V8 69.3 inch Bed EXT Cab
- 2011 GMC Sierra 1500 SLT 6.2L V8 69.3 inch Bed EXT Cab
|Shipping Method||UPS/FedEx/USPS Ground|
|Availability||Possibly special-order. Call or email to check stock.|
|California Prop 65 Warning||
This product can expose you to chemicals including lead and chromium (hexavalent compounds) which are known to the State of California to cause cancer and birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov