+1, should be fine to use. What cams are they? I know I didn't need a tune after i installed my stage 3's but i did put it on a dyno just to check. They guy told me i could get a dyno tune but would probably only pick up around 10rwhp more, but i didn't want to spend that much just for the 10rwhp at that time. Everything looked fine and it was on a brenspeed tune.
2014 Mustang GT, A6, Grabber Blue