speed with top down

[RaceWinner]

With side windows up and wind deflector installed there will be wind flapping starting at 100mph.
With no wind deflector installed top speeds over 140mph aren't no problem.

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[Jim Hendrickson]

I had very bad air flow/buffeting above 80. Not vibrations, gusts that could make driving real fast with the top down unsafe. Since then I noted the tire pressures were high and varied also it came with low engine oil ( just below the second hole). Both have been addressed, I will have to try top down speed again.