Whats the difference between K-Planes 280S & 280C?

The last letter?

S stands for sport. C stands for competition. The only difference that I know of was that the sports had black powdercoated rams and the comps had polished stainless steel rams. If they are in a kit, the comps have a heavy duty pump with an alum res compared to the standard plastic res on the sport.

http://www.mercruiserparts.com/Show_...F+846215A02%29

http://www.mercruiserparts.com/Show_...+A04%2F+A05%29

http://www.mercruiserparts.com/Show_...2F+845588A2%29

The C has bigger pin on the cylinder then the S !!!!!!!! but both use the same casting !

same with the 380 !

From looking at the pics, what K-planes do I have?

280 s