Hello, "The Truth" here. All of this "ST" stuff is absolutely new for me! I had no idea there was so much that could be done to & there were so many ST enthusiast!! I've done a few things to my 2023. I just finished installing the Billet aluminum inserts into the rear vertical arms. Really gave me pause, beyond driving & having maintenance done, this type of stuff is all brand new! But regarding replacing stock mufflers. What if you simply want to replace the mufflers a lone, is that possible with the ST??