Your Cart Is Empty

2011 GMC Sierra Flowmaster Exhaust

Quality craftsmanship, attention to details and superior strength make your 2011 GMC Sierra a cut above other trucks. Provide your pride and joy with even greater capabilities by installing a 2011 GMC Sierra Flowmaster Exhaust System from AutoAnything. It's time to replace your Sierra's restrictive factory system with an enhanced, high-quality, free-flowing exhaust system. Designed to provide your Sierra with additional horsepower and improved fuel economy, Flowmaster Exhaust Systems for your 2011 GMC Sierra feature mandrel-bent tubing made to maximize exhaust flow. By investing in this Flowmaster Exhaust System, you provide your ride with improved MPG, overwhelming horsepower gains and the loudest, most famous exhaust tone in the automotive industry. Save even more when you order from AutoAnything, thanks to our standard, Free Shipping policy and 1-Year, Lower Price Guarantee with every purchase.
Have a Question?
Have a Question? Ask a product expert! (800) 874-8888 Live Chat
2 3 4 5 >

  • shipping icon
  • Not Rated Yet


View all reviews for this product

There are no customer reviews for this product

You may only compare up to 5 products at a time.
Please select at least two products to start comparing.
2 3 4 5 >

Latest Customer Reviews

JBA Cat4ward Headers Reviews

Great Headers

Reviewed By Micheal W (BAYTOWN, TX) Reviewed for a 2011 GMC Sierra —9/25/2017 8:39 PM

The best set of headers I've ever bought. Customer for life

View More Reviews

Flowmaster Exhaust Systems Reviews

Cheap clamps

Reviewed By Antone M (middletown, RI) Reviewed for a 2011 GMC Sierra —5/25/2017 4:27 PM

Good system, downfall clamps don't seal and no converter clamp . For that money through the clamp in !!

View More Reviews

dB Performance Exhaust by Corsa Reviews

Great exhaust!

Reviewed By Maxwell T (WINDSOR, CO) Reviewed for a 2011 GMC Sierra —4/28/2017 8:49 AM

The sound is incredible on my little 4.8L V8 an I couldn't be happier with the purchase. It has a deep growl on start up and during idle, to me it almost sounds like a diesel without the turbo whine. Very quiet in the cab when cruising and absolutely no drone. When you get on the gas you can really hear it open up. As far as performance, it feels like i had some gains especially coupled with my CAI but its to early to tell if I'm getting any extra MPGs. Can't stop mashing the pedal to the floor!

View More Reviews