I have a 05 SCrew Lariat 5.4. I really wanna get an exhaust on it to hear that great rumble. Anyone have any advice in terms of exhaust. I usually only would buy a Magnaflow system. My main problem with the duals is lots of times I see them on 150's and the two pipes are not even height coming out the back. Also what kind of gains can I expect?

 

Visit the exhaust section and read the exhaust guide (aka the bible). Don't expect any gains from a simple cat-back, because it's minuscule at best.

 

True duals, x-pipe, and straight through mufller of your choice. Also don't accept the work a shop does if you are not satisfied with the work. Here is mine the shop that did it does great work, only place i will ever go.