Loss Of Power On THe Way Home Last Night

[Jimjific]

So about a mile from my house I was following a car when a car coming the other direction cuts in front of us and we have to hit our brakes pretty hard. Nothing crazy happened, but I then tried to accelerate back up to speed the truck suddenly sounded loud and it lost its power. I limp home the rest of the way thankful that I was able to make it. Oil pressure was fine as well as the temp. Over the past few weeks I thought I was hearing what sounded like a small exhaust leak. When I opened the hood you could definitely tell that there was now a big exhaust issue on the left side manifold area. This morning I took off the heat shield and you can see a nice long crack running down the center of the manifold. So my question is, can the loss of power be caused by this leak? Napa has the center dump for that side $140 - Ouch!

Thanks,
Jim