Originally Posted By: rooflessVW
Originally Posted By: slacktide_bitog
Drilled rotors are actually not a good idea.
Hmm... You should tell:
Porsche
BMW
Mercedes
Audi
Ferrari
Lamborghini
And countless others. Yes, you may see cracking in drilled rotors - at the end of their life.
They already know, and even admit it themselves.
Also, those OEM Porsche/BMW/etc. drilled rotors cost a lot more, mostly because the process for making decent "drilled" rotors that won't crack in 3 months is much more involved. Actually, they're not even actually drilled. They are cast. Their holes are round at the edges, not bored straight thru like cheap drilled rotors you see on eBay.
The only drilled rotors worth buying are DBA, and the premium OEM rotors you mention. All are hideously expensive (like $200+ per rotor).
Cracking rotors is the very definition of the end of their life
Originally Posted By: madeej11
Why would reputable brake companies like EBC, Power Stop, etc.even sell drilled rotors if they are OFTEN prone to cracking ? In fact they even sell their daily driver upgrade kits drilled and slotted.
Because they want to make money, hint: Fast and Furious
Other examples include K&N air filters and blue headlights. Not really upgrades, but people still line up to buy them and pay a premium.