Exhaust leak question
So I finally installed the Heart Throb cat-to-axel 3" system, and I have a weird sound. I am assuming it is an exhaust leak, but can’t find where it is coming from. Does anyone have any advice on finding leaks? There were two of us installing it, and we had the car on a lift, so we took our time and made sure everything was positioned right. Started it on the lift and felt for leaks, but all seemed ok. This morning I drove her around to get the exhaust hot, and then tightened all the clamps. When I first start the car, it just sounds weird. If I give it a little gas, the sound goes away. It's not the typical ticking noise, but I just can't describe it. I am thinking of going to a local exhaust shop and having them fab up some axel-backs, but that will have to wait a couple of weeks. Anyone here have any ideas?
2016 Mustang GT