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3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Isn't there a number stamped on it anywhere? On the flowmasters it is usually on the flat end where the inlet is at so I would imagine that a knockoff would have it there too.