True duals, split the "y" & run 2 1/4" aluminized pipes out the back, no mufflers, 24" crome tips. I'm like an expecting father in the delivery waiting room. 97 f-150 supercab 4x4 lariat with the 5.4, auto trans. I will keep you all posted, I figured start with straight pipes & check out the sound, I can always add mufflers If I want them. I will take some digital photo's of the system & post them. I don't know what it will sound like, I've heard some say it's the only way to go & others say it's too loud, we will soon see.