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I read something funny in the c6 forum......that only posted chevy numbers are acceptable. So, if chevy says its 171.....then it could not POSSIBLY go any faster. I made the claim that it was possible that the top speed of the c5 is 179-180MPH.....and all the c6 people went off on me....they said it couldn't possibly go that fast......so eveyone who says faster that 171 is a liar.... :troll
I guess I shouldn't go into the C6 section :jester Check my signature for my top speed then notice where where I live. :D
well, its all gearing, 5th runs out at 175-178 and then you dont have the power to pull 6th stock. You either need more power or a lower rear end ratio to go ahead and hit 6th at a lower speed.
Plus the Hardtop is less aerodynamic than the coupe.