Sorry i did not see this other thread though here are the FAQ follow>---->Slotted Rotors- Revisited FAQ: Slotted/ cross drilled
Originally posted by Big Jim:
Drilled and slotted rotors do nothing for the performance of your brakes. Get them only if you feel that you must have them for looks, and be aware that drilling and slotting may actually decrease the life of the rotors.


First off I'm not trying to knock you, just inquiring for more info.
Q:If drilled and slotted rotors do nothing for braking performance then why do they used them on the Lemans GT cars? There was an article link in a post awhile ago that explained this in detail, IIRC.
From what i have read,cross drilled rotors are made primarily for cars equipped with integrated "brake ducts" like Porsche's,BMW and Corvettes.
This channel of air forces its way from behind the rotor out through the holes, causing a cooling affect. Yes they will probably eat up pads a lot quicker.
I hear all the time "don't get Cross drilled rotors they will crack after a few months" well if you buy crap rotors, I'm sure they will, and if you don't have ture brake ducts you may be at more of a risk as well. If one were to buy Brembo rotors, "cross drilled by Brembo" they would be ok.
The failure rate tests these rotors go through is like 300%,engineers design them this way so covers the legality issues of being liable etc.
please feel free to correct me. Once again I'm not trying to argue, just my $.02

Last edited by BlackSleeper; 02/17/05 09:49 PM.