I have a 2017 GMC Sierra Denali with the 5.3L. I had just the TR muffler on my previous Chevy truck. I wanted to go all out and get the complete cat-back kit this go around. If you want aggressive and clean, this is your kit. Brings a smile to my face on every start up. I would suggest and have suggested these exhaust kits to friends for their trucks. Will buy again with next truck.