I would start with simple measurements of the intake and exhaust system followed by some air flow calculations. Pretty easy to see where the restrictions especially for the 3.2 were made.
And no - a sport muffler is not the solution. Ugh, did i write the word solution. Bah, maybe someone will hit me with a patent right now.
But hey, no offense. Love that entertaining videos.
Regards, Markus
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