With the combination of sounds, squeak and rattle, seems like a lifter to me.. The squeak often times indicates the lifter's needle bearings are / have gone out. Had lifter issues on my 2011 that sounded very similar; was hard to identify since the sound appeared to be coming from the the throttle body area. Hoping its something simple, but thats my guess.

 

My guess would be lifter if it's internal, but it could be something external rattling.

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first thing i would do is tighten up the heat shields and everything else. but it does kinda sound like a lifter.

 

sound clip is not working for me. Just keeps loading and loading.

 

 

Using a long screwdriver put the tip in several locations while listening through the handle, I would start at the pushrod covers.

 

Chain guides.... I would also take a good look at your compensator... Did you hear that big clunk at start up?

 

Get yourself a 2 ear mechanics stethoscope. You will at least be able to pinpoint it better. Add the soundtrack here as an attachment. I need to sign up for an account to here it at your shortcut.

 

The only thing that I'm 100 percent sure of is you should probably not run it anymore till you do some investigating. My vote also goes to a lifter crapped out on you. Good luck and keep us posted on what you find