hey i just bought a flowmaster super 44 for my 2001 4.7 dakota. when i bought i they guy said they only had one in stock and it was for a 04 F150, but the same dimensions. so is there any difference? i mean it is the same diameter input and output

 

as long as the inlet and outlet are the same size then no it does not matter, thats a universal muffler. here is a video of it installed on my 2002 4.7. the first half of the video is the stock muffler, but if you go to about :54 it is a clip of the flowmaster installed

http://www.youtube.com/watch?v=ZvlMF0LukVY

 

video is kinda bad quality sound-wise but you get the idea