i have like 10.5 in rotors now, and i wanna upgrade them cause they're so freaking small, so if i were to put on 11 or if i could get 12in to fit, then would i have to upgrade my calipers also, i am going to eventualy upgrade the calipers, but money is kinda short now.

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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass

 

Yes you have to change the caliper or the mounting bracket. In your case you may have to change the spindles.

 

no, maybe not, I know on dirtbikes you can get a larger disc for the front and use the same caliper but with an adapter braket. What this does is increase the braking power by having more leverage, kind of like trying to unscrew a screw with a small handled screw driver and a larger one, the larger one has more leverage and make the screw turn easier. if the larger rotor are about the same thickness then he can make a braket to move the caliper out it might work and you will see a improvment in braking power.

 

anyone know any good brake sites or comapanys etc.?

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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass