This is my top five...
Coming in finth we have the 2005 BMW, as stated that was debuted at France was just stupid as well as dangerous
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Fourth, as you pointed out would be the Tyrrell "X-wing" fighter... did it have a purpose?
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Third, for one reason or another is this... dont know what is is... its just ugly
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Second would have to be the Brabham BT26A... enough said
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First, in my opinion, would have to be the the Ensign that raced at Interlagos in 1979... what the hell was that?