Originally Posted by nico club

I made a thread a few days ago asking about this subject, but I decided to make a new thread with a more search-friendly title.It is confirmed, 1994-2000 Nissan Altima front rotors are the same overall size as the G50 Q45 brake rotors. The only differences are:
Altima rotors are factory drilled to 4x114.3
Altima rotors are slightly thinner than stock Q discs (about 3-6mm eyeballing it)
I bought the Q brakes because a local machine shop will be able to drill them for me at a low price, and the extra thickness will give me a longer rotor life before replacing.
Also, Q rotors were cheaper for me. I get parts at cost through my works supplier; Q brakes list at 58.99, I paid 25.50. Altima rotors list at 46.99, I would have to pay 35.26.

Hope this helps some future Q brake upgraders!
-Andrew