I am using the Sebro slotted rotors on my 986S. Got tired of inspecting the cracks in the OEM discs and worrying when they were going to go "hole to hole". So far I have only run them for one hard track day, but happy so far.
Giro Discs are perhaps an even better performance rotor, but at much higher cost.
I have read of some significant quality problems on DBA, and decided to stay away from them.
I don't know about StopTech, but they are very popular in some circles.
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Kippis
986S
991S
Van Diemen RF97
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