Sport and Nismo do have the same brakes. The base brakes are different (smaller).

It's not the size that matters, or at least that's what the ladies tell me. :ugh2:

theres a minimum rotor width number in the owners manual. yes the factory rotors can be turned but only to that minimum thickness.

One of the troubles with buying "eBay rotors" is that there is no such thing -- just companies looking for the lowest cost marketing outlet. While not all sellers are bad, many are small operations using Centric (who is not a true OE supplier to my knowledge and is not a manufacturer -- they just source from low cost manufacturing countries like many others do) or other blanks and sophomoric finishing techniques. There is very little in actual quality control as they do not have the staff to perform those tasks. They also struggle to provide customer service after the sale in the event anything goes wrong.

Others turn to NAPA or other big chain store, who buy cheap white box rotors in bulk from the lowest cost supplier of the day. One set might give good enough results, but the next might be horrible. Of course, they just replace a bad set, which is great for those customers who have plenty of unallocated time on their hands and don't mind the hassle of taking the same parts on and off their cars repeatedly.

Most people are better off shopping for quality parts to begin with. Obviously, look for the best deals you can as there are specials from time to time. But trying to save money up front that ends up costing more later (in time, effort and money) is not usually the best way to go.

Just thought I would put my two in....

I put a set of ebay slotted on a friends 350 a couple years back and everything seemed to be ehhhh ok when braking until you need to break from 100+.
The initial breaking from the 100 was fine but every time you break after that point you get terrible wheel wobble.

About a year later a buddy "hooked me up" with some rotors for my STI and yea I dont know how the FUH it happened but a huge a55 chunk broke off the rotor when driving to school! I came to later find out that my buddy got them off of ebay.

I personally will never buy ebay parts. I think especially if its stoping your car!!! lol your life depends on it and your cars life (yes she is a living entity in which we are one once I enter her... not in that way sickos!) so why be cheap? Go the extra mile and unclench them butt-cheaks!

Agreed. I did this with my '09 Acura TSX. 22K miles and I had roasted the stockers. 5K on Power slots & HPS and very happy.

I learned long ago stay away from the cheap (mystery meat) rotors.

For my Z, this would be the absolute minimum. When I need new brakes I'll probably do a Stop-tech upgrade as I did on my 350Z.

Me too. That's why I give them a hundred miles three inches at a time.

Geez, I hope that is true.

save a couple of hundred bucks and get the rotor cut

Cut rotors have a couple of drawbacks. In both cases you're working with units that are now thinner. One is the ability to shed the same degree of heat - remember rotors don't stop you, pads don't stop you, it's a combination of the friction they generate that does the trick (along with tire grip- of course). Thinner rotors are also much more likely to warp from quick temperature changes such as running through a water puddle that cools them too quickly.

As to Ebay stuff - it's cheap for a reason but don't think for a minute that the Autozone, Advance Auto, O'Reilly's or whatever down the street doesn't source them from the same wholesaler who in turn sourced them from a manufacturer that gave them the best deal. There's some truth in "Tommy Boy". Even Nissan sources it's components from different outfits but you can normally assume that the specifications are going to be tighter, the inspections and QC are going to be better - no manufacturer is going to want to lose a contract with Nissan for supplying junk parts.