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I don't believe you can put a 3.73 gear in your ZL1's diff. You might be able to swap in a M6 ZL1 diff which has a 3.42 gear set. Even then I would think that is still way too much gear with the A10's 4.57 1st gear...especially for your power level on street tires.
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2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |