There is so little info on the 03-04 springs I can't honestly be sure. Here are some resources I found:
CB-Racing, 986 Suspension Info
http://986forum.com/forums/performance-technical-chat/27222-m030-spring-rates.html
ROW M030 shocks and alternatives
One option might be to call someplace like suncoast and ask for the part numbers for an 03 S manual and see what they give you and we can compare to what I have. I plan to take some pictures tonight and post them including the color codes/part numbers where possible.
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