Thread: Cheapo BBK....
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      03-27-2012, 03:31 PM   #23
GaryS
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Drives: 2009 135i 6MT
Join Date: Feb 2010
Location: Maryland

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2009 135i  [6.50]
I did some googling and found there are at least two 996 calipers. One has 36mm and 40mm pistons. Another one has 36mm and 44mm pistons.

Assuming I didn't mess up the calculations, the bigger one has slightly more clamping power than 135i calipers and would provide torque equal to 135i brakes if 325mm rotors are used. The smaller one has slightly less clamping power than 135i calipers and would need 360mm rotors to provide equal torque.
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