Also, try to refrain from jumping on the "more pistons = better" bandwagon. Just because one has more pistons, does not make it better.
I do remember hearing about rim clearance issues with the mitsu 4-piston setup. It's those 2 outer pistons that make em so damn wide, you might have to run spacers with certain rims.
Yes the cobra/baer setup is 2-piston, but keep in mind not all 2-piston setups are equal. The cobra/baer setup adds a much larger rotor, which is a good thing because now you have a larger "lever" (think about how a breaker bar works). Stock 2-piston calipers on a stock rotor is a decent setup, but a larger rotor will allow for better braking torque, so make sure to keep that in mind.
As for the brackets, I completely forgot about working with Primo about that. I'll have to give them a ring because I realised I put the calipers on wrong. I put the bleeder nipples facing down, and they are supposed to face up (because air rises and you want to bleed out the air, so they should be at the top). So when I do that swap, maybe I'll pay them a visit, they're minutes from my work
