I'm still at work, so I cant check the rotors side by side. My wife bought 1990 4DR rotors instead of the 1990 Si rotors, and the guy at Autozone said they would be fine. I dont know what model the guy was looking at, and from what I can tell the DX, and the LX are the same rotors, but the EX might be different.

Can anyone verify what rotors from a 4DR I can use?

Thanks,
Jake

 

You can't use the EX Rotors, they are 10.2" or so, while stock SIs are 9.5"

 

I know that DX rotors are different than Si rotors, I belive that one or the other is thinner, also the EX rotors are different not sure about LX rotors though?

 

DX/LX are the same thing. The SI rotors are thicker I believe.