get a 9'' from what i hear 12 bolts are still kind of a stock design and still are prone to breaking. i wont speak about the 12 bolt ask cbr mike though, he's had his 2 years and i think he's already rebuilt it at least once...not sure if he HAD to though.
as for the 9''....i have one in my car...i like it...need some tires...but the rear holds up very well...its jsut heavy
