I'm looking at buying a set of used HKS 272's or so they are said to be. I'm waiting on a photo from the seller and just want to make sure they are in fact HKS 272's. I know they should have HKS stamped on them but how about the grind duration? Should they have 272 stamped on them also? THanks in advance.

 

There is a number engraved on them,(I believe it is on the hex that you would put a wrench on to turn cams when installed)very small but can be seen just the same.
For HKS 272's the intake will be AM003 and exhaust will be AM004 and for the 280's they will be as follows, intake AM007 and exhaust will be AM008 this is of course for an evo 8 and not a 9. BTW,the casting will have HKS in it between cam lobes.

 

Excellent, thank you very much sir!

 

N/P,hope that info helped.