Looking at getting DP3954C and DP31407C pads.

Do the stock rotors need to be upgraded too?

 

for the best performance with ebc do it all!

 

but do ceramic pads work with the steel discs on the ralliart?

 

You should be fine unless you go with a full race pad.

 

I'm considering these exact same pads as well.

Personally I think when I upgrade I will most likley also upgrade the rotors to the sport rotors GD7336 and GD 1576. It seems pretty apparent the sport rotors should cool a lot better and prevent the probability of fade.

http://www.ebcbrakes.com/automotive/...t_rotors.shtml