i had a real one awhile back.... there is two distinguishable difference between an auth spoon and a rep...the neck of the real ones are generally smaller (approx. 1.5") and appear to be a one piece instead of a welded on flange and the mounts were made for 2.25" ONLY whereas the replicas are made for a universal fit between 1.5 and 2.5 on the header end....but either way its only a pipe....as long as it fits and doesn't leak....they all serve the same purpose