New engine old knocking

ZoeRider615

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Genesis Model Type
1G Genesis Coupe (2009-2016)
So i just bought this 2.0T with 79k miles on it. The engine seized up on me under warranty and was completely replaced. I now have a refurbished engine that A.) Runs slower than it did before the new engine B.) Crazy knocking sound around 3k rpms like i showed in the video. I keep being told its the waste gate and that the new engine has to be "broken in" but this is my first gen. Not my first car and ive never heard an unpleasant and unsettling sound like this from a "healthy" car. Please help in any way. At this point i will try anything to at least get it a little more quiet.
 
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