Flowmaster's Outlaw Cat-back exhaust system for the 2014-2018 GM Silverado and Sierra 1500 trucks (also fits 2019 classic models) is perfect for the person looking for maximum sound levels both inside and outside of the truck, with all of the performance benefits that you would expect from Flowmaster.
Bought this kit for my 2018 Silverado and couldn't be happier! Sounds great and only took me an hour to install in my driveway. Only problem was getting the exhaust tip on was very difficult! But after some force I got them on.