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09-12 crf450r piston work in 13-16 engines?

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Just curious if it would work? I know the 13 head has 1mm bigger exhaust valves so I'm thinking maybe they made the reliefs in the 13 piston bigger . the .5 bump in compression isn't much. 

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After market they do, had a 13.5cp in my 13.Why put a 9-12 stock piston in a 13 ,their 12-1. Bike runs way better with more compression my new 17 is 13.5 stock. Clay see if it hits ,I bet it doesnt .I had 19 thou off my 15s head with stage 2 hot cam it was fine.

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