Wow what a difference. I can really tell it above 3500 rpm. I never realized what just a muffler swap would do. I didnt really look at the flowmaster when it was put on because it was used but I was looking for a p/n on it and it didnt even say flowmaster. Iv had a proflow this whole time and never knew it. Il get a soundclip asap. Sounds a lot more racey and pops a little. Kinda reminds me of a slp loudmouth on a vette.

 

You'll love it... I have a pair on my Silverado SS, had flows on my Z71 and like these a lot more!