Originally Posted by Fintile
Oh god, dude no...the headers are the best thing you could have done. Should have ditched the flowmasters. Im telling you it is a much easier and cheaper way to go. No idea you even installed the headers.
Look I have tried every muffler I can. The flowmaster 44s were the only ones that gave that v8 like rumble which I want. They were shorties not long tubes. I hated the sound they produced. Made the car sound eruo. That sound is good for some people not me. Im much happier with the car without em. You want em? put them on your car. I do not want them.
To use those headers and get my rumble sound back that I like so much I would have had to replace my cats with high flow cats or an O/R pipe. I CAN NOT do that. I have a 125,000 mile Ford ESP (almost bumper to bumper) warranty on my car. It has paid for it self 3x now. I am not voiding that over a sound. Sorry. Ford flat out said headers would not void anything but touching the cats would void my ECU warranty. Not doing it.
A MAC tech told me that headers alone would remove that rumble "which they did" I would have to replace the cats also to get it back. So stock manifolds were my only option. As I said if anyone wants some slightly used shorty mac headers PM me on here.
PS the headers were NOT installed in that video.