Sounds good but after adding a slip-on are you guys also adding a power commander (PCIII or PC V). I guess what I'm asking is that after you replace the stock exhaust with an aftermarket slip-on what else needs to be done For me, it's runs so good (after installing the different muffler) I'm not messing with the GYTR tuner, or a Power Commander. So, to answer your question, Nothing needs to be done. That said, many guys buy the plug-and-play GYTR tuner to change it up some. A Power Commander is better for more fine tuning. A LOTTA people aren't satisfied with stock, even though stock is good.