I don't think you can since the A3 uses a different vtec system than the A2. I could be wrong, but all I found were cams for the A2. Nothing was mentioned about the A3.

 

I have been looking for cams and I have heard through a source that Skunk2 is going to be coming out with a set in about a month. In the mean time I have ordered a full Ferrea valvetrain with 1mm oversized valves, and am getting my head port and polished.

 

Ya I have read at a couple different places that the I-VTECH in the EP3 is different than the Type S. We only have I-VTECH on the intake cam while the type S has it on both. That is why there is such a HP difference between the cars.