Distinguishing the difference between intake and exhaust valve springs?

Hi everyone.

I've just purchased a set of B18C type R OEM valvesprings off a member on this forum, but I don't know how to separate the exhaust ones from the intake ones??? they all look the same and I can't see any coloured markings or anything?

any help would be appreciated as they need to go in this wednesday with my cams. thanks!

**I originally posted this in the integra forum but no answer so mods you may delete the other one if you wish**

they usually have a colour marking on them.

yeah these ones were used, but it's all good i managed to divide them because I measured them up and the intake ones are slightly taller.

thanks though. :)