the yellow n green paint on the type r valve sprin

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i hav bought the type r valve spring ... n i found the 2 type of colours on the springs....yellow n green... can anyone tell me which one is for the "in" n which one is for the "ex" ?? thanx... :)
Damn, I was just alking about this with someone. I think yellow is intake and green is exhaust? I really can't fucking remember. And I have to go to work or I'd search it out for you....