12-bolt rear end
#2
its the size of the housing. our 10 bolts have a 7.5" ring gear where a 12 bolt which is much larger has an 8.75"?? ring gear. the larger the parts, the longer they will last and hold up to abuse. when guys talk about a 9", it has a 9" gear for comparison.. its also about the most heavy duty rear you can get for our cars.
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dbusch22
Forced Induction
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10-31-2016 11:09 AM