Well the EBPV and intake heater, you probably shouldn't worry about since they are gone.
The ICP code comes up a lot if you have a good chip. And especially since you have stage 2's I wouldn't worry about it. It is just something you will have. If it really bothers you and you want to get rid of the code it will mean that you need to upgrade your HPOP system which will run you in the 1k to 2k range. So unless it bothers you a bunch, don't worry about it until you have the funds to support your other mod's.