Not sure which 2012 GMC Sierra Performance Mufflers are right for you? We have over 976 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"this muffler has a great deep sound. It's not to loud but it's loud enough. Great product and great price at autoanything!" —Blake A from Beaumont, TX bought a Flowmaster Super 40 Series Mufflers for a 2012 GMC Sierra.