Well i didnt see any point in buying a catback for the 6.2 sierra its 3.5" from the factory and the catbacks from various brands are 3.5" so your paying for new piping for no reason and a muffler. SO for a cheaper setup i purchased a 3.5" in and out 50 series Big Block Flowmaster its a perfect fit no adding or taking away from the factory piping its not overly loud it prob got bout 25% louder sounds sweet i havent owned a flowmaster since back in high school when they were popular on Fox body mustangs so i have to admit for $210 installed im really pleased with the sound quality and fitment. Soon ill be adding 1-7/8" lt's and cats.

 

this post is worthless with out a video LOL, jk man but a video would be sweet!

 

yeah x2 on a video would really like to hear how it sounds with that muffler...congrats

Question: Would you want to sell your factory muffler?