I actually bought the base because I knew I would be replacing the sport brakes and sport differential.
My mistake on the cost…I figured if you had $5k-$6k for a turbo then the diff would be in your budget.
I also figured grip off the line would be important for drag. I am running 2013 stock Z base 18s and tires and no longer have an issue with breaking traction(with traction control off). Changing rims, tires, and final drive will not make much of a difference if your diff fails to deliver the power to you rubber.
Just my thoughts for what it’s worth
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