HKS cams- whats intake whats exhaust!!?/

[onesicklambo]

well i have hks 264/264 cams, and I think I mixed them up. they both say :
HKS SR20
one says: R1, the other says R2. Is the intake or exhuast side r1? please help:faint:

[Def]

The exhaust cam will have the longer dowel pin for the CAS gear.