Hard to tell from the photo but yes, the rings are seated in the engine block and not in the cooler, so they will be larger than the in/out ports on the cooler. Use the o-ring numbers that petain to your motor.
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James now has: 2008 987S 6 speed
Crashed: 2010 987.2 pdk in speed yellow! 
Sold to a cool racer chick: 2004 986 S
YouTube channel: the PORSCHE as seen by NewArt
www.youtube.com/channel/UCohdrH2xHTklM1thxk0KKOQ?
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