https://youtu.be/Uf9PzeTOeNs https://youtu.be/zDpZk5Jy87U Here's a couple vids I did a few years back when my 408 was still alive. 3" muffs and x over. I didn't know this at the time but Flowmaster told me you do not run crossover/scavenger pipes with scavengers muffs as they both perform the same job. super 44's do sound nice without being annoying IMO.