What do you make of this sound?

So.. Just got an invidia catless up pipe installed this week. Everything seems to be running fine, feels good pulling, don't smell any exhaust leak but this is what it sounds like idling.. ... Clicky..? Ideas? Is this normal? I'm running an open source stage 1 tune that was made for an 05 LGT with the setup I have now (I have an 06). Catless up, stock dp, 3" catback.

https://www.youtube.com/watch?v=Hsyw_SBmZ-k

Also, seems to go away when revving and doesn't seem to be there during a cold start, but rather after driving.