As for slotted rotors like the ATE Power discs, they look kind of cool, but for most people they don't have much advantage beyond that.
Reviews of ATE brake discs
168 votes
I have ATE powerdiscs on front and Zimmerman Xdrilled on rear. They both rust. I haven't had any problems yet with warping on either but I installed them about 2-3 monthes ago. I've heard that the Xdrilled can begin cracking around the holes so I'm watching out for this. So far I'm happy with the setup. I also have the mintex redbox pads. Slightly better than OEM and a whole lot less messy. My rims don't collect much dust anymore.
You can change to vented 9.4's; without changing the calipers! Just get vented rotors and the corresponding pads. The rotors are no different. Adirondack does a Mintex Red Box pads/ATE PowerDisc package - 2 rotors & a set of pads, $84.00.
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