is this 200 or 185??

[roadx]

looks like a 185or a 200s piston, im i wrong?
http://imagehost.auctionwatch.com/bin/imageserver.x/00000000/robhill2/.mids/200XCP2.jpg

[Fuzzy]

Yep it is deffinately a s piston. The x woulh of had a hump in the middle and two notches out of it for the valves.