Nice info... good to get real numbers! Nationals are in a few weeks if Im not mistaken, so good luck! Last year's TTB nat'l champ has instructed me before, he's hella fast in his M3...
And I would want to say with OEM rails the GT3 seats would be over that 16lbs... but the way I have my driver GT3 seat, with BK floor mount hardware... Im under that number.
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