I started using the Z1 2 piece rotors this year along with XP10/8 pads. I also have brake ducts with 3" tubing. This combo worked great for me at Pitt Race in June and the Glen in July. Then in October at the Lightning I had a lot of shudder and vibration. I'm planning on switching over to RBs over the winter.
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[SOLD] 2012 Metallic Black NISM O 370z #499
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