2009 Chevrolet Tahoe 5.3 V8 4x4 weird clicking sound on cold start.

[crimson cloud]

Hello, I have been hearing this clicking noise on cold starts and it settles down as the car warms up. Recently got a muffler delete and now it is more audible. Any thoughts on what could be causing this? Thanks!

@proud knot sorry for the tag but tagging you since you have helped me a lot of times before

[proud knot]

Exhaust leak?