Extreme energy

These extreme energy cams sound pretty good to me. Comp told me that i would have to buy break-in springs to start it. I have 26120 bee hive springs that i'm going to keep on the victor heads. The springs are able to run with that cam.
Which heads are you guys running on those motors?
...........Thanks; Rick..........

cnc ported victor knock offs, w/ retainers and keepers from comp. almost ported max wedge flow.