Hilux
New member
Non-drilled or grooved disks work perfectly fine and there is no need to change them other than for aesthetic reasons (no problem with that as long as people are honest about it and don't try to justify it on the premise of some performance benefit) - unless you are racing or a real hard-core trackdayer. Furthermore they are more robust than drilled disks as they are not prone to cracking.
Agree completely. I believe OEM Porsche ones had the holes cast in so the grain was uninterrupted wheras aftermarket discs have the holes drilled which cuts the grain.