Well, I put on a mufflex 18. Mufflex is a magna flow muffler made to bolt right on. It comes in 24, 18, or 14. 24 quietest 14th is the loudest. It is a really common system. I've heard some flow masters and they seem cool too. Go check out you-tube there are some good videos. Just make sure you watch out for in cab drone. Because our trucks go into 4 cylinder mode it will cause a different sound and may get annoying. That's why I went with the 18 instead of the 14. It's all personal opinion.
BDS 6 inch. Fox 2.0 rear. Toyo MT 35x12.50x18. Yukon 4.56's. Detroit Truetrac. Mufflex 18. Airaid CAI.