12 bolt or 9IN"
The 12 bolt is good at least to 600HP. It's 25 pounds lighter than the Dana S60, 10 pounds lighter than the 9 inch. You can get it with the ABS sensor. It has a better pinion angle so less power is lost to heat, like 5 percent.
I’ll say you’re best bet would be the 12 bolt. For a everyday stick car, 3.73. Maybe 4.11.
Good luck!
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