How heavy was that sled?
A lot of things don't add up in this video to me.
1. Front end seems high but not ridiculous
2. I've seen cognito braces bend and even break before and with the bad geometry of that setup, could mangle the cognito's pretty bad.
3. Center links have been known to also twist which wouldn't help the cognito's either.
4. Fabtech tie rods are pretty beefy so that shouldn't be an issue, unless they were upside-down.
5. Are those stock tires?
6. I've seen trucks pull with green keys and they didn't do that.
After writing down this list, I'm calling BS. That looks like a stock truck with stock tires and zero prep. The engine even sounds fairly stock, maybe tuning only.
No way does someone go to all the trouble of buying and installing all of those front end parts to pull and then not prep for the pull. Especially, if said person has put money into the engine. And if this was a result of not prepping the truck after spending all that money, then he should have any and all Duramax privileges removed until he knows better.