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Ok, after a little reading on this board and LS1GTO.com I think it is reasonable to say that C5 brake pads will fit on an '04 GTO.

Does anyone have a problem with this statement?

If this is true, then can I also say that I can use C5 rotors? I mean afterall, if the C5 pad will fit our calipers and our standard rotors, is there any reason to believe that a C5 rotor will not fit?

My reason

GMPARTSDIRECT.com has the following

Ceramic C5 brake pad kit for $40.36 per axel, part # 88909667
Drilled and slotted rotor $40.36 each, part # 88926732

To me this sounds like a hell of a package if we can make it work! And for cheep too.

Ceramic pad all the way around, drilled and slotted rotor all the way around and an extra $20 for th break paint kit and bang we have a breaking set up that looks just as good as ours does and stops better than an '05.

I know, I know, if it sounds too good to be true then it is, right? So someone smart tell me what I am missing.

thanks
 

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check the rotor diameter. The ones you list should be larger than the 11.7 diameter GTO stock. That means you would have to obtain different suspension to caliber bracket. I used the C5 pads on stock rotors and have had no problems. They were new so I did not have to turn them to accept the increased verticle contact area.
 

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C5 rotors have a different diameter, a different bolt pattern, a different offset and a different thickness.
 
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