exhaust question

From : jason dominguez

Q: got an 08 ram 5.7. want to change muffler out with 40 series flowmaster. at the end of my exhaust theres a little mini muffler i was told its a resanator or resignator if replace the resanator with a straight pipe and add the muffler will it void out my warranty or trigger anything causing the engine light obd light or any light to come on. was told no. just getting other opinions. thank you jason .