greetings....... I have a 99.5.. Mods are improved intake ,Dp tuner,zoodad,wicked wheel etc.. I also have the walker big truck muffler ! I wasnt sure I wanted the full sound... My Question is after installing the WW I dont seem to have the whistle like other trucks... I noticed a couple of 97s with muffler deletesthat scream> In order to get the full sound do I need to remove the walker and straight pipe.....thanks