I have a late 03 G35 coupe with what I assume are the factory brakes and rotors. They are not the brembo kit because there is no branding. I bought the Brakemotive rotors and pads kit for the 03-07 G35 coupe and attempted to install but the rotors are about 1/2 an inch small on both sides when I place them on top of the current rotors. So if they aren't the Brembo's or standard, what could they be? The pads that came with them are smaller length wise when placed against the current ones too. I measured the rotors that I bought and they are a little over 11 1/2 inches.

 

There are actually 3 brake systems for the 03-07 coupe

03-04 had the brembo brakes with the 6MT models
http://www.zcarblog.com/wp-content/u...3908165859.jpg


03-04 standard brakes are single piston front caliper with 11.7" front rotors and 11.5" rear rotors
http://www.allnissaninfinitiparts.co...or-caliper.jpg

05-07 have 2-piston front calipers, with larger diameter rotors. 12.6" front and 12.1" rear
http://www.pix8.net/pro/pic.php?u=11130S5RAi&i=1140617


You can see how all the calipers are different on the above systems in the front
Since you know you don't have brembo's, what it sounds like is someone swapped on 05+ brakes on your car...at least the front. You'll need to measure the back as well to confirm.

 

Thanks for the reply!

I found that out last night after some measuring and research. It's awesome because it's an upgrade but now I gotta ship back the front rotors and pads to be swapped for the 05s lol.