[moonmonkey]

since exaust is a bunch of pulses that line up in a row and flow nicely out the exaust system in an orderly fashon, (in fantasy land) at the perfect diameter pipe and rpm,. and we know the manufaturer has to compromise on the size to allow operation across a broad rpm range, what would be the benifit of installing a smaller pipe size from the header collector to the tailpipe, including finding a smaller size muffler and cat converter (if they exist) would you also have to get/make smaller primary tubes and collector or could you start the smaller exaust at your stock size header collector? i,ve read other data/posts that talk about restricting the exaust or creating backpressure. that is not the same thing as a smaller pipe, putting a singlar restriction in any position would only serve to create a (trubulent mess) im talking smooth sailing for the pulses, targeting around 2000-2500 rpm (where i live) for most of my driving. i dont care if my hp drops from 108 to58 ,if my mpg goes up enough,, i could be barking up the wrong tree but im interested in some of you engine guys opnions as to the possible benifit/problems.