hmmmm.. that's odd. They are all 4.10 tunes. I have 2 from Bama ( 1 with a lower 1st gear for traction, the other full race tune) and a standard Brenspeed 4.10 tune. They all have stock tire sizes on the tune as well.
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CAI/tune, 4.10s, JBA Shorties
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13.2@103mph
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