New "ticking" noise

[splat]

This one has me worried. Most of the video is my hand but you can clearly hear the sound, it sounds like its coming out near the top of the cylinder on the back drivers side (believe that's #6) I checked the oil and coolant levels and both are fine. I've had the LIM gasket replaced before so I'm ruling that out but you never know... and the oil was changed less than 1000 miles ago.... Any ideas?
https://youtu.be/3yKeztRlbaA

[Fivefingerdeathpunch]

Exhaust leak is what it sounds like to me.

[splat]

Exhaust leak is what it sounds like to me.

I didn't even think about an exhaust leak, I hope so because that's a lot cheaper than what I was thinking it might be. I guess I should have noted I have headers and a 3" downpipe. I haven't ever heard this before and the headers have been on there for at least 3 years, what would be the cause? Maybe they weren't reinstalled properly the last time I had work done to the tranny? That was about 2-3 months ago but I hadn't heard it anytime before then

[Fivefingerdeathpunch]

Cracked header pipe, broken flex pipe, broken egr tube, loose bolts, bad manifold exhaust gasket.

Anything like that is a possible cause.