All rotors have some identification marking on them. It’s required for them to pass DOT certification. It’s usually pinstamped into the hat as some garble of numbers and letter. On vented rotors it’s also usually along the edge. Almost all automotive parts have to carry some identifiable marking. (Source of information - I work for General Motors Component Holdings and we make several parts, large and small, for internal engine stuff like lifters, cam phasers, cylinder deactivation systems and large components like entire front and rear axle assemblies.) If you’re ISO:9001 or you plan on selling your parts to an OEM, they have to be traceable from start to finish. Brake rotors are no different.Little do you know, companies don't stamp their name on the drilled rotors I have seen. You really can't seem to comprehend anything I say can you? And you're not able to figure out something I say without me explaining it. It seems you have an old age problem not me!
EBC manufactures and sells the GD Sport line of rotors which are cross drilled and slotted. So, I’m not sure what your hate is for cross drilled rotors, but if you don’t like them, that’s cool. Don’t run them. Every major brake manufacturer sells cross drilled rotors. EBC, Hawk, Brembo... every single one has some form of a drilled rotor. Just take a step back man... it’s not really that big of a deal.I guess all those photos of cracked drilled rotors and the articles I posted are all fake. (Even though they came from EBC and other reputable websites that DON'T sell them or don't condone their use because they CAN crack) And next time I see someone's car that has cracked drilled rotors I'll make sure I have them remove the wheel so I can find the unidentifiable numbers and letters, then try to figure out what they mean so I can post the company name here along with photos I take of their rotors since some of you don't believe this really happens. In the mean time if your rotors do fail don't expect any sympathy from me or flowers at your funeral.
Their own website called them “dimple drilled” which is somewhat misleading. But I get what you’re saying.Obviously you are mistaken, EBC does not sell drilled rotors, their rotors are dimpled. This is from the their website in the link that I posted but you failed to read it so I'll let you read it below.
These rotors are THROUGH DRILLED or CROSS DRILLED which EBC DOES NOT MANUFACTURE and strongly recommends against for numerous reasons. First of all you can see that striped or banding is already appearing after this short driving period which is typical of a brake rotor where the drill holes do not “Overlap” leaving uneven areas of the brake rotor surface contacted by the brake pads. This eventually would lead to “Ribbing” or ridges developing on the rotor which causes poor brake contact and further down the road, when new pads are again fitted they will take an age to bed in UNLESS you turn the rotors back to a flat surface condition.
Second amateur rotor drilling companies may not take the time to ensure that their drill holes fall into the vent pockets in the rotor which are between the two faces of the brake rotor. If these THROUGH DRILLED HOLES are drilled right through into the support vanes in the rotor core this will GREATLY weaken the structural strength of the rotor. Even IF the supplier does manage to take the time to locate the through drilled holes to fall into the vent pockets between the vane supports it has been seen on many occasions that cracks develop around the through drilled holes as shown here. Eventually the rotor cracks and will very likely suffer a catastrophic failure.
For this reason EBC Brakes does not supply or recommend THROUGH DRILLED ROTORS and always supplies carefully designed dimple drilled rotors. In over 15 years selling sport rotors EBC Brakes has not suffered ONE SINGLE FAILURE of its sport rotor products.