I have an 06 F-150 5.4L. Right now its straight piped right from the cat, and not all that loud. But im looking at just doing the cheapy duals...1 in 2 out. because it puts off too much heat just diminished the look of my tip. so i was wondering what anyone else is using for a 1 in 2 out muffler and with a good rumble to it. And now i am thinking of high flow cats. so any suggertions on mufflers will be awsome. thx guys

 

I did the same thing you are doing for a while. I had a flowmaster 40 for a while. It got ruined. So i did straight pipe. But then i bought a cherry bomb pro. It rumbles really well and has no drone. I have a 4.6 and i turn heads when i go by. I have 4 inch tips that are 20 inches long.