I recently installed BBK long tube headers, and my problem occurred after installing them is there's a deep rattling noise that happens when slowing moving when in a gear happens the most in reverse doesn't happen all the time but most the time going over a bump or turning over one and when more gas is used it's more prominent. my steering shaft does wiggle a bit in its place. i was just wondering if anyone could have any idea what it could be?
i will update with a video of the noise once i make one.

 

Welcome to the forum, please take a minute to learn the set up. Every generation of Mustang has a section and you need to post in the proper section.

Unless somehow your use of the forum is causing this issue: but I don't hear any rattles from my use of the forum.

Obviously you are posting in the wrong section of the forum with this.