Quote:
Originally Posted by Lee
Boyd Butler - a.k.a. Dr. Gas - has done a lot of research, to optimize his "X" design. There are others that are probably good, but I personally will spend a bit extra to get the one I trust the most - Dr. Gas.
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That is correct. Been a while since I bought one, but he would tailor the design of the X based on the engine combo and exhaust parameters, which explains the price difference.
So to answer a previous question, to my knowledge, No the other X's on the market are not the same.