I have a little dilema over here, I seem to have mixed up my cams and not sure which is which, I have a (ex r2) which i believe to be the exhaust ap2 cam and a (in r4) which i believe is an ap1 intake cam, is there any way to tell them apart easily? ex and in has to mean exhaust and intake right?

 

you are right about the ex and in markings but I do not know the difference between AP1 and AP2 cams as far as the markings.

 

IN and EX does mean intake and exhaust and to be sure which is AP1 and AP2 if you have other AP1 and AP2 cams mixed in with those, you could just micrometer the lobe lift areas and check spec sheets on them all to be sure.