The Hemi engines are known to have a tick resulting from a leaking exhaust manifold. You mentioned "headers". Has the OEM system been modified?
The first place I would inspect is the exhaust manifolds. They are a common issue. Also, try to take note of where it seems loudest. For example, it is from the front of the vehicle, near the driver's door, and so on.
If it is loud enough for you to record and upload for me to hear, that could be very helpful. Also, let me know if there have been modifications.
Tuesday, November 23rd, 2021 AT 7:43 PM