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Stock rotor sitting on the 12.5" rotor
 Stock rotor sitting on top of 12.7" rotor

Rotor lineup, L to R, stock, 12.5", 12.7", 13". The 13" will be available sonn with Porsche 911 calipers, Front AND REAR will be available in 13". 
The porsche 13" will start at ~$1300 for front or rear.
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