Eh, my custom intake makes some tick/knock at 2k through 3k too. Mainly under load, gets quiet under boost or at higher rpm. Just how these engines are noisy. Never bothered me. It's a 04, and did it since I put the intake on, before the engine work and after. I feel this is perfectly normal and shouldn't worry you. If you pay attention, you will notice it mainly only happen when in overdrive, trying to go up a slight hill.
You have to deal with it or stick the airbox back on!
KR Sounds more like popcorn and you can feel a power loss, as in the intake ticking under light load, well you won't feel any power loss and if you monitor, won't see any KR.
