a2 cams ?
a3 cams ?
type r cams?

sorry i searched for info but none found

 

are you purchasing one of them from someone? and wanna make sure you're not getting ripped off? cuz I've seen some pics here on FS section of a2's and a3's..., not side by side, but some are very good quality pics and you might be able to compare them one vs. the other and see the differences in the lobes. Sorry no links to provide for you...

 

I believe crsx has a guide to tell the difference in cams...

 

i've seen an awesome cam comparison on k20a.org but I can't find it right now...