For those of you wondering about the warranty as well, I have an answer for you! I contacted RAM warranty customer service to find out if changing the muffler or lifting the truck would void the warranty. The representative told me NO, it WILL NOT void the warranty
I also asked the representative if he could provide this to me in writing. He said it is on page 13 of your warranty booklet, under 3.1, A, and falls under the first bullet:
"3.1 Modifications Not Covered
A. Some Modifications Don’t Void the Warranties But Aren’t Covered
Certain changes that you might make to your vehicle do not, by themselves, void the warranties described in this booklet. Examples of some of these changes are:
• installing non-FCA US parts, components, or equipment (such as a non-FCA US radio or speed control); and"
The representative did say, if the muffler or lifting your truck causes another part of your truck to go back, it MAY NOT be covered under the manufactures warranty.
Hope this helps folks out!