Here's a thread from the Hellcat forum where someone posted before/after dyno results on an HC.Also very interested in some Dyno comparisons. Or at least the Dyno app graph comparisons back to back on the performance pages. Their momentum interested was shown to reduce power with other hellcats. I really like how it looks, but the lower ait and really a bit more power is really what the point is, right? I am sceptical, but would love to be proven wrong.
It does sound like a few people are noticing better throttle responses, so that's good. So there might be hope
The poster's conclusion was that the JLT added about 15 HP and I've seen similar numbers for the aFe.
EDIT: can't post links. Search for "JLT CAI fitment and performance" on the Hellcat forum.