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Old 01-29-2018, 12:47 PM   #7
PaulE
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Join Date: Jan 2014
Location: New Jersey
Posts: 1,631
I don't think the difference you're feeling is due to the extra 6 hp between the 03 and the 04 550 SE. I think it is the differences in the torque and HP curves along the way to those peak HP numbers. They are probably more significant!
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