Ebay brake rotors review
I bought some rotors off ebay from V12 Motorsports. I chose them because there was a thread recommending them and they're inexpensive. They are drilled and slotted but you can order them just drilled or slotted or blanks since they are machined after you buy them. I chose only slotted because anything other than blanks adds brake wear and drilled rotors can crack occasionally. The seller is excellent to deal with, although the rotors do take a few days to machine the holes and slots.
I have some concerns with the rotors though. The slots have a very small lip around them that you can just barely see. If you run your finger nail across the slot, you'll feel it hit the lip. I was worried that this might cause brake wear and after a few days my wheels had lots of brake dust on them. Next, the rotors have directional cooling vanes so there should be a left and a right so airflow is goes in the right direction. All the rotors they sell have directional vanes designed for a right wheel. I emailed them and got this response:
"We understand exactly what you mean regarding both rotors vanes being tilted same direction- we have a few more front sets ready for today's shipments. The performance comes from drilled/slotted, the internal vanes will be cool (much cooler than OE blank) regardless of both vanes in same direction. Everything will be OK, trust us =)"
I remember reading one time that over 90% of cooling on drilled and slotted rotors comes from the vanes. Everything else about them is decent quality. Do you guys think the directional cooling vanes going the wrong way is a problem?