They do?
Also, do they dust less? The rotors, not the pads. Do they produce reduced cleaning chores for my slave army (ME) than the stockers? Have you tried them side-by-side against the stockers with the same pad material?
I'm all for less wear and less dust.
So:
The rotors are not the CAUSE of dust. Different pads cause different amounts of dust while others hardly dust at all. Don't matter what rotor. A pad like the OE pad from Brembo is a very durable metallic all around pad. On the street with normal driving, when cold most of the time, it does a nasty cold grinding job on the rotors, putting off dust from itself and also from the rotor it is wearing out prematurely. Take it to the track, and its materials are made to also be a performer with more heat. It will lay down a film onto the rotor if it is "bedded-in" appropriately and work good. They are good all around pads. Not as good as "racing" pads. Read on...
A pad like a Power-stop Z26 is made from Carbon-Fiber/Ceramic. Those are MUCH more kind to the rotor. They are ok for the street, they won't dust, they won't have the "bite" of the OE Brembo's. Some people don't like that or the fact that they WILL fade from excessive heat upon several panic stops together. But, those type of pads don't have the heat resistance and would fail on applications like on a road course. Or stopping after a half mile or longer race some of the members do. Remember, dusting we find on our wheels and cars will be inversely proportionate to dust. More dust, more bite and wear, less dust, less bite, less overall performance.
I compare those two, because they are the most common choices we always talk about for replacement or basically street use.
Rotors. Do I speak from my own experience? Yes. On the street, I can tell you with a Brembo pad, both a DP rotor and a Brembo rotor will dust. I have used both. On the street with a Z26 pad; no dust. I have used both.
On a road course, I have used both rotors. I have also used for example a Porterfield racing style pad with both. On the Brembo rotor, those worked ok. However, when matched up against the different materials in the DP rotors, those pads failed and caught fire! After that, the set of DP front rotors looked like hell. What did I do, because at the time, I wanted to reinstall my Powerstops for the street? Came home, put in the Brembo pads for a few miles of cold grinding action! They actually made the rotors more smooth and cleaned them off! They were cracked and looked like shit, but were fine for the street, and I used Z26 pads!
What did I learn? The Porterfield pads did not have the resistance to the heat that was being generated against the harder and stronger DP rotor. So after asking some very senior instructors at our track, they recommended some MUCH more expensive Hawk pads for the course.
I used the Brembo rotors on courses for about a season and 1/2. Or say about six sessions. First sessions, I was not as experienced or aggressive as comes with experience. The Brembo's with their own or Porterfield pads lasted about 4 or so days.
I then was introduced to DP rotors. They are made by Gyrodisc, one of the premiere racing brake manufacturers. They save about 30 lbs of unsprung weight over all four corners (more in the rear, plus giving us a two piece design for better heat dissipation). Then magic happened! Use of the most nasty and highest temperature Hawk DTC pads against the DP rotors, not only produced shorter stopping distances than any previous combo, but the DP rotors seem like they have an unreal resistance to wear! I say I am getting double or more wear resistance with the use of DP rotors.
Long response, sorry. Recap: if you are in the market for new rotors, the DP rotors are about the same cost as replacement Brembo rotors, they are lighter and more wear resistant. No difference in dust. Make your choice, but don't spend two more thousand!
If you don't need rotors and your still on the OE pads, change them out to avoid dust. I removed the OE pads before I even drove my RE. About 3000 miles later with the Z26 pads, I defy anyone to even say my rotors have more than a few miles on them! With my street driving style, I really don't expect to ever need new rotors.
When I track my car, I simply do a complete brake job. I have a set of four DP rotors (not my first damaged set), matched to Hawk DTC pads. Shit yes the dust is rampant and is heavy, but that is because they are working, FYI they are not compatible with carbon-ceramic rotors, they work with iron/metal type rotors. But my racing brake system is lighter than the OE set-up and with the different fluid with higher dry and wet boiling points for the MUCH hotter operation, works great all the time. No need to look at items that are thousands more expensive, which finally (sorry) is the point of my response and info back that you, sir. It would be horrible for the street. They would dust WORSE then an OE Brembo set and would grind the hell out of the rotors when cold (almost always on the street). Personally, they are fine for racing, but for street driving with my style of driving, I hate them, they have an uncomfortable bite IMO. I practice smooth driving on the street, I'll look several stop lights ahead to avoid even using the brakes! I really like the Z26 feel for the street of almost nothing compared with what this thing is capable of with different equipment.